Outlook Archives — SysTools Software Official Tech Updates by Team SysTools Thu, 29 Jan 2026 12:29:01 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 Retrieve Deleted Contacts in MS Outlook 2010, 2021 & Other Versions https://www.systoolsgroup.com/updates/how-to-retrieve-deleted-contacts-in-outlook-2010/ Wed, 28 Jan 2026 12:25:00 +0000 https://www.systoolsgroup.com/updates/?p=3504 Are you looking for a reliable solution on how to retrieve deleted contacts in Outlook 2010? If yes, then, you are landed at the correct place. In this blog, we

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Are you looking for a reliable solution on how to retrieve deleted contacts in Outlook 2010? If yes, then, you are landed at the correct place. In this blog, we are going to discuss a simple way to recover lost or deleted contacts in Outlook 2021, 2019, 2016, 2013, 2010, 2007 editions.

As we all know, contacts always play a significant role when it comes to being in comparison with others. In this modern era, with the rise in usage of the internet, most the people want to connect with others, whether at a personal or professional level. At a certain time, users accidentally delete multiple email messages along with a contact list during mailbox cleanup.

Although the worst thing that happened to anyone is while managing mailboxes they accidentally press Shift+Delete keys together on crucial emails. At that time, one question arises in every user’s mind is how to restore deleted contacts in Outlook 2010, 2013, or 2016 editions efficiently.

Actually, is it not an easy task to recover lost or deleted contact group from Outlook 2021, 2019, 2016, 2013, 2010, 2007, 2003 versions. Therefore, in this blog, we are going to discuss a manual solution to recover deleted contacts in Microsoft Outlook in an efficient manner.

How to Manually Retrieve Deleted Contacts in Outlook 2010?

This is a very common situation when users try to find the missing contact list in Outlook 2016. The contact was deleted while to clearing or managing the address book or accidentally texted the wrong person or maybe someone was using your PC and made a simple mistake.

Unfortunately, if you may have emptied Deleted Items folder, and all of the contacts were lost, it might be unrecoverable. However, if this folder has not been emptied, still you should be able to find lost contacts in Outlook 2010 Deleted Items folder. Follow the given below steps:

Recover Deleted Contacts in Outlook Deleted Items Folder

When you erase the contact, it can switch towards the Deleted Items folder in your mailbox just like the deleted email message. The Deleted Items folder is an initial place to view if you are trying to find or retrieve deleted contact list in Outlook. If contact is there, then follow the below steps to retrieve deleted contacts in Outlook 2010 and other versions:

  • Now, select the Deleted Items folder on the left-hand side of the window to show all contents of a folder. If there will be a limited number of items in this folder, you should not have any difficulties finding the missing contact. Though, if there are too many items in the folder, you may need to do some filtering.

  • Then, you can use Search Deleted Items box or click CTRL + E to find all items you wish to recover. Or you can arrange them by Icon column to group all contacts in the Deleted Items folder.

  • When you find every contact group, right-click it, and select Move and Other Folder option.

  • After that, move contact list back to your contacts, click Contacts, and then press the OK button. Thus you can efficiently retrieve deleted contacts in Outlook 2010 and other versions like Outlook 2016, 2013, 2007, 2003 etc.

Tips to Restore Deleted Contacts Group in Outlook Deleted Items Folder

  • If you have deleted a subfolder from the Contacts folder, it can be moved to Deleted Items folder and shows as a subfolder. To recover the subfolder including all the contacts, you just choose it in the list of the folder under Deleted Items, right-click it, select Move Folder and then, Contacts to switch a subfolder back to the Contacts folder
  • The administrator may have set up a policy to remove items from the Deleted Items folder after a large number of days. For example, when you delete an item from the Deleted Items folder, all items erased by a policy and moved to a Recoverable Items folder. Hence, if you will not get a contact list in your Deleted Items folder, search for it in Recoverable Items folder.

Recover Deleted Contacts that are no longer in Deleted Items Folder

If you could not find lost contact in Outlook 2007 and other versions Deleted Items folder, the next option is to search in Recoverable Items folder of Microsoft Outlook. This folder is hidden in which contacts are moved when you execute one of the following actions:

  1. Delete a list of contacts from the Deleted Items folder.
  2. Empty the Deleted Items folder
  3. Permanently erase a contact by selecting it & pressing Shift+Delete.

Follow these steps to retrieve deleted contacts in Outlook 2010 Recoverable Items folder. These steps can be referred for other Microsoft Outlook versions like Outlook 2021, 2019, 2016, 2013, 2007, etc. also.

  • In MS Outlook, choose the email folder list, and then select Deleted Items.
  • Be sure the Home is selected, and then, navigate to Recover Deleted Items From Server.

  • To help you find a lost or missing contact in Recover Deleted Items window, choose the Subject column header to sort all items by using that column. Look for your contact name. Also, you can sort by From column and then, look for all the blank entries because contacts do not have value in the From field.

  • Finally, choose the contact that you want to recover, click on Restore Selected Items, and then press the OK button.

Tips to Retrieve Deleted Contacts in Recoverable Items Folder

  • Noted that the Deleted On date presents when all items were permanently deleted (Shift + Delete) or deleted from Deleted Items folder. Then, arrange by the Deleted On column to find all of the contacts from a subfolder that was permanently deleted because those contacts will have a similar date. This will be very helpful to retrieve deleted contacts in Outlook 2010, 2013, 2016, and other lower editions.
  • All items available in the Recoverable Items folder that includes contacts—are represented by the exact icon, which seems like an envelope.
  • To recover all contacts, click the Restore Selected Items, and then press the CTRL key as you choose each contact. Also, you can recover more than one adjacent contact by selecting the first item, holding down the Shift key, and selecting the last contact that you want to restore.

Use This Expert Solution When Manual Solutions Fail

There are so many drawbacks that users may experience while using the manual approach. For example, it is a very time-consuming and lengthy procedure to recover deleted contacts from Outlook PST. Thus, users start searching for an instant or efficient approach to restoring deleted contact group in Microsoft Outlook account. One such application is SysTools Outlook PST Recovery Software.

Download Now Purchase Now

It is programmed especially to recover deleted items and to repair corrupt data in a PST file. It has a simple and interactive user interface that even a novice user can understand its working without taking external help. The application support MS Outlook 2016, 2013, 2010, 2007, 2003, 2000 PST files in Windows OS.

Also Read: Recover Data from a 0 KB Outlook PST File

For Mac OS Users

If you are getting any issue with Mac Outlook, then you can try the Mac Outlook Recovery Software that is developed for Mac Outlook.

Download Software Purchase Software

Final Words

When users are unable to find a simple way to retrieve deleted contacts in Outlook 2010 then, it becomes worse. Thus, to help out all the Outlook users to recover lost or deleted PST contacts we have discussed a manual approach by which users can restore deleted contacts from Microsoft Outlook. Else, users can opt for the trusted automated tool as suggested in the blog. It is the finest solution that will help to regain all corrupted .pst files without any hassle.

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Here’s How to Repair Your Outlook Personal Folder File (.pst) 2010 https://www.systoolsgroup.com/updates/how-to-repair-your-outlook-personal-folder-file-pst-2010/ Tue, 27 Jan 2026 12:15:00 +0000 https://www.systoolsgroup.com/updates/?p=3367 Want to repair your Outlook Personal Folder file (.pst) 2010 in Microsoft Outlook account without causing any data loss or data damage? This article is for you. But before going

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Want to repair your Outlook Personal Folder file (.pst) 2010 in Microsoft Outlook account without causing any data loss or data damage? This article is for you. But before going deeply into this, let us see introduce Outlook file formats.

Microsoft Outlook is undoubtedly the most sophisticated desktop-based email client used by both business and individual users. The best part of Outlook is that it provides highly advanced features and access to important data even in offline mode also. OST and PST are the two type of data file supported by MS Outlook. OST maintains the copy of Exchange Server mailbox data on the local machine and lets users work in an offline mode.

PST is Personal Storage Table stores all data items of the mailbox on the local machine. Like any other file, the PST file has also a predefined size limit and when this limit is about to reach, it starts creating issues. Based on the versions of Outlook, PST file is of two types i.e., ANSI and UNICODE. Outlook 2003 and below versions create ANSI type PST file with 2 GB file size limit. Outlook 2007 and above versions create UNICODE type PST file with a 20 to 50 GB size limit.

Despite being so famous among the users, there are some major issues faced by Outlook users. One such common issue is Outlook.pst is not a personal folder file.

As PST file plays a very important role in MS Outlook users life so, a user cannot afford even a small problem with it. If such type of error has arisen, it needs to fix as soon as possible. Therefore, how to repair your Outlook Personal Folder file (.pst) 2010 is the common query by the users to regain access back to PST file.

Outlook Personal File (.PST) Issues & Errors

In some cases, the Outlook PST file becomes inaccessible or damaged. And, when a user tries to access or import that inaccessible PST, it displays the following type of error messages:

  • “Outlook.pst is not a personal folders file.”
  • “Outlook Personal Folder is Missing”
  • “Outlook.pst cannot be found”
  • Cannot start Microsoft Outlook, Cannot open the Outlook window. The set of folders cannot be opened.”

Alternative Solution to Repair Your Outlook Personal Folder File (.pst)

If the PST file is badly damaged, then it is impossible to repair it using a manual approach. However, scanpst.exe is not at all a reliable approach to overcome major level corruption issues in Outlook. Thus, to have a guaranteed solution, a user is recommended to switch to an automated tool. SysTools Outlook PST Repair Tool tool is a popular application to deal with all types of corruption issues in Outlook. It repairs all data items stored in the PST file like emails, contacts, calendars, journals, etc. A user can run this application on any version of Windows OS.

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Repair Mac Outlook 

If you are facing any damage issue in Mac Outlook and want to repair damaged Mac Outlook OLM, OLK14, OLK15, then try Mac Outlook Recovery Tool. The tool is well capable to repair your Mac Outlook.

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How to Repair a Damaged Outlook Personal Folders File (.pst)?

Understand brief steps for repairing damaged or corrupted MS Outlook Personal Folder files in few simple steps with SysTools Software. Follow quick 5 steps working to understand the software.

  • Step 1: Download and add your personal data files (.pst)
  • Step 2: Choose the Advanced Scan option to repair the data file
  • Step 3: Click on Add to start scanning processing
  • Step 4: Export previewed data items into PST file
  • Step 5: Provide destination and required settings options best pst fix tool

Resolving a damaged Outlook data file (POP file) and easily accessing its data items in your Outlook account. The below image displays scanned corrupted PST file result in software preview panel. The application not only repair severely corrupted data file (.pst), it can display the entire data items in loaded user PST. This displayed data (maintains meta-data) can be saved as per user requirement any file formats (here PST, or in MSG, EML, PDF, HTML, Office 365 etc.)

Reasons Behind PST File Corruption

Now, if a user is frequently facing such type of error messages, then it is important to identify the root cause of this error. Here, we have covered all possible reasons behind these errors:

There are various causes of PST file corruption and all of them are listed below:

  • Large Size of PST File: If the size of the Outlook data file is about to reach the predefined limit, then there are chances of corruption in the PST file. It is one of the primary reasons behind the damaged PST file.
  • Hardware Related Issue: Any type of physical damage to a peripheral connected to PST file can also lead to corruption.
  • Outlook Shutdown Abruptly: Sometimes due to sudden power shutdown Outlook is unable to save data in the PST file properly. And, whenever a user opens that PST file again, there is a disparity in the file and leads to corruption.
  • Virus & Malware Attack: Nowadays, the number of virus and malware attacks are increasing on daily. So, not even a PST file is immune from the same. It is quite common now that a user opens the email and it contains a malicious attachment. However, a virus can damage the Outlook PST file very easily.

How to Repair your Outlook Personal Folder File (.pst) 2010 & Other Versions?

As discussed above, the primary reason behind this Outlook Personal Folders missing issue is due to corruption. So, to remove corruption, a user needs to repair it.

  • Fix Your Broken Outlook Personal Folders (.pst) File
    The best part of Microsoft is that it has designed each Office program with an inbuilt repair feature. So you just need to find out where is ScanPST tool is located according to your Outlook version. Moreover, this feature lets the applications fight against the damage issues in PST file. A user can take the help of this utility to repair a damaged Outlook personal folders file (.pst) 2010 and other versions. But, there is an issue with this inbuilt utility, it is only capable to remove the minor level of corruption from the PST file, and also sometimes this Inbox Repair Tool creates a not responding error.

Apart from all this, there are some other factors also that might give rise to such errors. All such reasons with respective solutions are discussed below:

  • Change the PST File Authentication
    Microsoft Outlook can access the PST file that has authentication to read or write both. However, if a PST file has only read-only permission, then it cannot be accessed by Outlook. A user has to disable the Read-only property for the PST file but first make a copy of it to some external drive.
    Now, if any of the above tick is unable to solve this issue, then simply move to the next solution discussed below.

Conclusion

Any issue in emailing services can badly affect the work so, it is important to fix it as soon as possible. Like this, Outlook Personal Folder file (.pst) is missing or not found the issue is faced by the most of the users. Thus, to overcome such issue, there are various troubleshooting ways are discussed above. If your PST file is badly damaged, then how to repair your Outlook Personal Folder file (.pst) 2010 is the common query of users. Thus, to resolve this problem, one can switch to a third-party tool suggested above.

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Here’s How to Recover PST File Emails Securely in 2026 https://www.systoolsgroup.com/updates/how-to-recover-emails-from-pst-file/ Wed, 21 Jan 2026 12:32:00 +0000 https://www.systoolsgroup.com/updates/?p=3306 In business communication, email clients play an important role. While sending and receiving emails, any sort of hindrance is not tolerated. But what if the PST file storing your Outlook

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In business communication, email clients play an important role. While sending and receiving emails, any sort of hindrance is not tolerated. But what if the PST file storing your Outlook emails gets corrupted? Have you ever thought about how to recover email from PST files? This guide will show you the right way to recover PST.

Microsoft Outlook is one of the most commonly used email services across the globe, relied upon by organizations of all sizes. PST files may contain crucial information; hence, they need to be kept safe from unauthorized access and corruption. There are times when email messages from the PST file may get lost or corrupted, leaving users unable to access their emails. To regain access, it’s vital to repair corrupt PST files and recover lost emails without any data loss.

Why Do Emails Get Lost from PST Files?

Go through various reasons that can cause PST file corruption, resulting in the deletion or damage of emails. And this will also help you to understand why we need to recover email from PST files.

  • In prior versions of Microsoft Outlook, an ANSI PST file was created with a file size limitation of 2 GB. If this size is exceeded, the .pst file ends up corrupted, making it inaccessible and requiring you to recover the PST file.
  • Another situation is when an important email is misplaced or accidentally deleted, prompting the need to recover PST data.

This write-up explains the perfect and convenient solution to recover PST files.

User Queries on Recovering PST File Emails

Few real-time scenarios are discussed in the following section. The possible causes which result in the recovery of email from PST file are drafted in two user queries below:

“Hi, I am using Microsoft Outlook for 3 years. Last week while deleting some irrelevant data, I mistakenly removed my important emails. Now I do not know how to recover my PST file. Please, could you suggest any method to retrieve emails from PST files?”

“A few years back, I was using Outlook 2003. Now, a case has reopened and an ANSI PST is to be modified. This increases the size of the file and results in corruption. The email file is damaged and cannot be opened. Is there any way to recover the PST file?”

After reading these queries, the need to recover PST files should be clear. In all these scenarios, users seek a single answer, “How to recover deleted emails from a PST file without losing a single bit of data?”

How to Recover Email Messages from PST File?

  • Using ScanpST.exe aka Inbox Repair Tool
  • With MS Outlook “Import/Export” option
  • Restore PST file emails with Backup File
  • Using the SysTools PST Repair Tool

We are going to explain all these methods in detail in the following segments of the article. Read to find out which solution could be the best fit for your needs.

Using Inbox Repair Tool to Recover PST File Emails

  1. Firstly, shut down MS Outlook.
  2. Next, Locate ScanPST.exe on your system.
  3. Run the Inbox Repair Tool and browse your PST file.
  4. Upond doing so, click on “Start” to scan.
  5. Then, click “Repair” if it detects any errors.
  6. Lastly, re-open MS Outlook and check recovered emails.

While ScanPST is useful and completely free-of-cost, it possesses certain limitations like:

Restore PST File Emails Using Outlook Import/Export

  1. First and foremost, start MS Outlook on your system.
  2. Then, select “Open & Export” >> “Import/Export”
  3. Next, select “Import from another program or file”
  4. At last, choose PST file and import your data.

This is another manual method you can try out, but keep in mind that this solution only works when:

  • Your PST file is healthy.
  • Your emails exist but are not visible.

Recover Email Messages From Your Backup PST File

  1. Locate your last known PST backup.
  2. Replace your current PST file with it.
  3. Afterward, open MS Outlook and verify.

This is one of the safest methods of all however, this also has some limitations such as:

  • It only works if a backup PST file exists.
  • Users lose newer emails after backup date.

Recover PST Files – The Expert Way

You can easily recover your emails from PST file/s using an advanced automated solution like SysTools Outlook PST Recovery Software. This professional utility is the best way to extract data from lost or corrupted PST files. It’s simple but smart software to recover PST data in a straightforward, user-centric way. This tool can also work when the ScanPST tool is not responding.

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Benefits of Using This Automated Solution

Lost emails can be easily restored with this commercial application. But there are additional benefits too, which are written as follows:

  • Both ANSI and UNICODE types PST emails are supported
  • Removes corruption from password-protected files
  • Retrieve emails from PST files without any limitations
  • Remove email encryption in bulk
  • Repairs corrupted Outlook PST files along with other data items
  • Selective data can also be extracted using an email filter option
  • Easily recover emails from the backup file

Best Tool to Recover Mac Outlook Emails Data

If you are a Mac user and want to restore lost or damaged data from Mac Outlook OLK14, OLK15, or OLM files, use the Mac Outlook Recovery utility to recover PST data such as mails, contacts, calendars, tasks, and notes in minimal time.

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Easy Steps to Recover Mail from PST Files

  1. Click on All Programs and then launch the application to recover PST files.
  2. When the utility is opened, hit on Add File. It will display two options:
    • Select File
    • Search File

    Select or search for PST file to recover

  3. If the radio button corresponding to Select File is chosen, browse the PST file. Select the desired PST file and click the “Open” button. However, if you choose “Search File”, select from the following options:
    • Search All Drives: To find a PST file embedded within all storage drives
    • Search Selected Drive: To find a PST file embedded in a particular drive

    Search all drives to recover PST

  4. Once the searching process is done, the tool will show the complete list of PST files stored on that specific drive.
  5. Now, the storage path of the PST file will be shown on the software screen. There are 2 distinct modes available for scanning:
    • Quick: Enables faster recovery of emails in PST files. This option is helpful for slightly damaged PST files.
    • Advanced: If the PST file is highly corrupted, use this mode for deep data repair. It supports advanced scanning on 64-bit systems too.

    Set scan mode to recover email from PST file

  6. Once the PST file is selected, hit on the Add button to move ahead.
  7. This will start the scanning of the selected PST file.
  8. Once scanning is complete, a message box will prompt confirming the success of the procedure. If you want, the scanned report can be saved. Click on yes or no accordingly.

    Save scan or not for future PST recovery

  9. All added emails can be previewed on the software screen. There are different viewing options available; choose your preferred one.

    Software preview tabs for PST recovery

  10. From the left-side column, click on Mail to view only PST emails; then Export these emails.

    Export recovered PST file emails

  11. Choose PST and click on the Export button, then wait for the recovery process to complete.

    Export all recovered emails in new PST file

Once the process is complete, import the retrieved emails into your email application using the steps below.

Steps to Import PST File in MS Outlook Account

  1. Open the email application, click on File.
  2. Then, click on Open & Export followed by Import/Export menu
  3. Note: In Outlook 2010, 2007 – 2000, click on File and then, Import and Export
  4. Select the option of Import from another program or file
  5. In the next step, hit on Next button
  6. Pick up the option of the data file (.pst) or Personal Folder File (PST), based on the version you are using
  7. Then, click on Next again
  8. Select Browse to search and choose the recovered PST file.
  9. There are chances that the email client may look for the backup.pst file. But, you have to make sure that you use the Browse button for searching a PST file
  10. Then, pick the required option like:
    • Replace duplicates with items imported
    • Allow duplicates to be created
    • Do not import duplicates
  11. Click on Next button
  12. At last, hit on Finish

SysTools also launched a new software dedicated to recovering deleted emails from PST files (whether soft or permanently deleted). Users can opt for Outlook Deleted Items Recovery software to focus on restoring lost emails from PST.

Frequently Asked Questions (FAQs)

1. What is a PST file?

A PST (personal storage table) file is an Outlook data file. Microsoft Outlook uses PST to store emails and other data like contacts, calendars, tasks, notes, etc.

2. Why might I need to recover PST?

You may need to recover emails from a PST file if it gets corrupted or damaged. Another reason is if the data inside the PST file gets lost/deleted accidentally and you want to recover it.

3. How do I recover items from a PST file without software?

Microsoft Outlook provides a built-in ScanPST.exe tool to fix minor corruption. However, it does not recover deleted emails in PST files and does not work on severe corruption.

4. What is the best way to recover PST files?

The most reliable way to recover PST is to use dedicated software from trusted brands like SysTools. Tools like this one offer multiple advanced features for items retrieval.

Final Words

PST corruption or accidental deletion of emails can disrupt your workflow, but recovery is possible. While ScanPST.exe can fix small errors, it has its limitations. Thus, for complete recovery, including permanently deleted, encrypted, or severely corrupted PST files, the best option is a professional tool. It ensures data integrity, offers advanced scanning modes, and works across all Outlook versions. Therefore, by following the provided methods in this guide, you can successfully recover emails from PST files.

The post Here’s How to Recover PST File Emails Securely in 2026 appeared first on SysTools Software.

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How to Fix “Microsoft Outlook Email Search Not Working” Issue? https://www.systoolsgroup.com/updates/fix-microsoft-outlook-mail-search-not-working-issue/ Tue, 20 Jan 2026 12:51:00 +0000 https://www.systoolsgroup.com/updates/?p=4754 Is your Microsoft Outlook search not working properly? Do you find email messages missing from search results or searches showing incomplete data? You’re not alone. There are numerous users who

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Is your Microsoft Outlook search not working properly? Do you find email messages missing from search results or searches showing incomplete data? You’re not alone. There are numerous users who have reported their MS Outlook email search not working. Therefore, we have drafted this article to help you mitigate the issue. Here, we will explain why this happens and how to resolve the issue with manual and automated approaches. So, let’s get started!

Why Microsoft Outlook Mail Search Stops Working? – Top Reasons

Before diving into the fixes, let us first understand what causes this issue for users.

  • Search Index might be stuck or not updated recently.
  • MS Outlook may be excluded from indexed locations.
  • Windows Search Indexing might be corrupted or incomplete.
  • You might have an outdated MS Office or Windows OS version.
  • Your MS Outlook add-ins might be causing conflicts from within.
  • Severe corruption or heavy damage in the Outlook data file/s (PST & OST).

Now that we know the reasons why your Outlook mail search is not working properly, let us dive right into the solutions to resolve the issue. In the upcoming segments of the article, we will share both manual as well as automated approaches, choose the one that fulfills your requirements the best.

How to Fix ‘Outlook Search Is Not Working on Windows’ Problem?

  • Rebuild Outlook index
  • Check the locations of Outlook Index
  • Use the Windows Registry
  • Update the Microsoft Office
  • Check the setting of Outlook Indexing group policy
  • Repair Corruption using Outlook Recovery Software
  • Reinstall MS Outlook application

Let us now explain each of these methods in detail so you can pick which fits your requirements the best.

1. Rebuild Outlook Index

To resolve the Outlook Search problem, you need to recreate the Outlook index. There are two ways available to rebuild Outlook index. Also to resolve Outlook search grayed out issues, follow the given solution.

Way 1- By Using Program & Features

  1. At first, go to the search bar and type Control panel & open it.
  2. After that, click on the Programs >> Program & Features >> select Outlook or Microsoft Office (your version).
  3. Now, select Change option from the top of the menu and choose either Quick Repair or Online Repair option.
  4. Finally, click on the Repair button to resolve Outlook indexing problem without any internet connectivity.

Way 2- By Using Outlook Index Repair Menu

  1. At first, open the Outlook and go to the File menu >> Options >> Search.
  2. After that, select the Indexing Options, followed by Advanced and click on OK.
  3. Now, click on Rebuild button to rebuild the Outlook search index again.

2. Check the Locations of Outlook Index

Now, you need to check the Outlook Index locations by following these steps:

  1. Open the Outlook program >> Click on File menu >> Search >> Indexing Options.
  2. Now, choose the Modify option. Then, click the checkbox next to Microsoft Outlook (MSI\Gavin).
  3. Finally, press the OK button and restart your system.

3. Use the Windows Registry

To repair ‘Microsoft Outlook mail search not working’ issue by using Windows registry, you can follow the given below steps:

  1. First, press Windows + R key to open the Run dialog box then type regedit & press Enter key.
  2. Then, Registry Editor will open. Now, you need to press Ctrl + F key to open the search menu.
  3. After that, copy and paste the following registry key:
    HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windows Search
  4. Finally, select the New Dword (32-bit) and click on the OK button to complete the process.

4. Update the Microsoft Office

To resolve the ‘Microsoft Outlook mail search not working’ problem, you can also update the MS Office Suite with the latest version.

  1. Open the Outlook application, go to the File menu >> Office Account.
  2. Then, check the Update Options from the drop-down menu.
  3. Select the Update Now option if it is available.

5. Check the Setting of Outlook Indexing Group Policy

If something changing occurs in the Group Policy setting, then you may face any other issues. But it is worth to resolve the Outlook search problem. Unluckily, this option is only available to Windows 10 Pro users; it is not available for Home users.

  1. To check the Settings, type gpedit in the Start menu then go to the User Configuration option.
  2. After that, click on the Administrative Templates >> Search option.
  3. Now, check the Default excluded paths and Prevent indexing certain paths for alterations.
  4. If the policy statement is set to Not configured, then it will confirm this is not where your Outlook search problems stem from.

6. Repair Corruption in Outlook

Sometimes, Microsoft Outlook searches all mail items not working because of corruption in Outlook and PST file. So, first, you need to repair it by using the scanpst.exe or Inbox Repair Tool. But, this Outlook inbuilt utility can only resolve the minor corruption.

If your Outlook PST file keeps getting corrupted repeatedly then, you need to repair the damaged PST file using a reliable tool. One of the most famous and efficient tools is the SysTools Outlook PST Repair Tool. It will recover both minor and major corruption in MS Outlook.

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For Mac OS Users

If you are a Mac user and facing any issue in your Mac Outlook, then you can download the Mac Outlook Database Recovery Tool to repair any issue in Mac Outlook.

Free Download Purchase Now

7. Reinstall Microsoft Outlook Application

Another resolution method to fix Outlook mail search not working problem is to uninstall the Outlook application. After that, you can install the Outlook application again and access it. However, it is known that this solution is time-consuming and tedious. Also, it cannot be a reliable solution but this is the last resort that will surely fix the Outlook search problem. If all the above-discussed methods fail, then you can try this one.

For Mac Outlook Users: Read blog on Email Search not working in Outlook for Mac

Summing Up

As we discussed, Outlook users often need to find emails but when the mailbox has a huge amount of data items, then it becomes a difficult task to find any information. Sometimes, it also displays an error message “Microsoft Outlook mail search not working”. Therefore, in this write up, we have discussed the top seven methods to resolve Outlook search problem.

The post How to Fix “Microsoft Outlook Email Search Not Working” Issue? appeared first on SysTools Software.

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Import OST to Outlook Classic and New Outlook for Windows https://www.systoolsgroup.com/updates/import-ost-file-to-outlook/ Wed, 14 Jan 2026 12:02:32 +0000 https://www.systoolsgroup.com/updates/?p=1701 This write-up will help you to understand the free and professional methods to import OST in Outlook classic and New Outlook account.  Before You Start – Understand This Before importing

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This write-up will help you to understand the free and professional methods to import OST in Outlook classic and New Outlook account. 

Before You Start – Understand This

Before importing an OST file into Microsoft Outlook, it is important to understand which Outlook version you are using. Microsoft currently provides two Outlook interfaces on Windows, and both behave differently when it comes to data file imports.

  • Outlook Classic (Desktop version) supports importing PST files and allows manual methods such as Export, Archive, and Import/Export wizard.
  • New Outlook for Windows does not support importing PST or OST files. Features related to local data files are currently unavailable in this version.

If you are using New Outlook, you must switch back to Outlook Classic to import OST file data after changing it into PST format.

Want to import an OST file into Outlook? Users often find it challenging to add an OST file in Outlook 365, 2019, 2016, 2013, 2010, and 2007. This is why importing OST files into the Microsoft Outlook profile is not practical unless you configure it manually. This is the reason users need to use a professional tool.

Therefore, in the upcoming piece of this blog, we have come up with some manual tricks to import OST file into Outlook. Alongside this, we have likewise acquired an interesting tool to complete this task rapidly. You can move directly to the steps and import OST in Outlook using the Software. Before that, let us experience a concise part that’s why Microsoft does not provide any facility to relink, add, or import OST to Outlook profile directly?

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attach ost file in outlook

Why Unable to Import OST File to Outlook?

Microsoft Outlook is compatible with two file formats, i.e., PST and OST. OST stands for Offline Storage data and saves the Exchange server database. At the time of synchronization of Exchange Server with Outlook, OST is generated, which serves as a local copy on the mail server & not required as a backup. Whereas PST is the default format in which Outlook stores its data.

Check out what Microsoft blog comments about it :

load ost file into outlook

It is easy to import PST to the Outlook profile, but in the case of OST, it is impossible. Therefore, to import OST file into Outlook. The file has to be in PST format.

Microsoft clearly mentioned in its Doc section that you can not import OST files to your Outlook profile directly.

import OST in Outlook

Also, there is no option to relink the OST file in Outlook profile. Don’t worry, this post explains other verified ways to access the OST file in Outlook with complete data.

relink ost in outlook

Import OST to Outlook – User Query

“I have recently received some OST files from one of my seniors. By using these files, I need to produce a presentation for my evaluation. However, I am unable to import OST file into Outlook. I do not have any idea whether it is possible or not. If it is possible, please suggest me any simple and fast method to import OST in Outlook 2013. This is very urgent.”

Methods to Import OST Files into Outlook

If you want to attach an OST file in Outlook manually free solution. Then follow the methods listed below:

  1. Import OST File into Outlook Manually Using Export Feature
  2. Add OST in Outlook For Free Using the Archive Feature
  3. Load OST into Microsoft Outlook by Creating a New PST
  4. 100% Secure Way to Import OST File to Outlook

Note: The methods below are application for Outlook Classic versions only. If you are using New Outlook for Windows, then revert to Classic Outlook and then proceed. Also, Microsoft 365 users can get detailed guide for importing PST to Office 365 account directly.

What is NOT available in New Outlook:

  • Import/Export wizard
  • File → Open & Export → Import/Export
  • Attach Outlook Data File (.pst)
  • Drag-and-drop PST into profile
  • Archive-based PST creation/import

Method-1: Utilize The Export Feature of MS Outlook

This method requires technical expertise &, and if you are not technically sound, then avoid using these steps:

Requirements:

  • The same Outlook profile must be configured and accessible.
  • Active Exchange Server Connection and Internet.

Steps:

  • Firstly, start Outlook
  • Now, click on “File”, then on “Export to a file”, and finally on “Next
  • Choose the “Personal File Folder (.pst)” and click “Next
  • After this, pick the folder that you wish to export and mark it “Include subfolders”.
  • Browse to the location to store the exported data and click on Finish

Limitation: The above-mentioned instructions are only valid in case you are connected to Microsoft Exchange Server.

Method-2: Utilize The Archive Feature of Microsoft Outlook

Perform steps carefully and avoid data loss. Because this method will avoid importing contacts, calendars, rules, etc. Steps to load the OST file into Outlook.

  • To begin the process, start Microsoft Outlook
  • Now, go to File and then hit Archive
  • You will see a window in front of you, choose the file or folder to archive it
  • Then, browse to the location where you desire to store the archived PST
  • Finally, once you click on OK, the process of archiving will start

Limitation: With this strategy, you will be unable to import OST to Outlook with complete data. It will skip the contacts.

Method-3: Export Outlook Database to a Fresh PST

  • Firstly, launch Microsoft Outlook
  • Then, generate a new Outlook Data File (.pst) in MS Outlook
  • Now, drag the complete mailbox folder, which you wish to export

Limitations of Using Free Ways to Import OST Files into Outlook

Again, with the help of this trick, it is not possible to drag Sent Items, Inbox, Calendars, Contacts, etc. into PST. As we have seen that every manual strategy comes up with some limitations. Therefore, it would not be wrong to say that manual solutions are not reliable for importing OST into Outlook 2021, 2019, 2016, 2013, and 2010.

This ultimately results in the need for third-party software. Nevertheless, there are several tools available in the online market for this purpose, but picking the right product is important. One of the most recommended utilities to import OST files in Microsoft Outlook 2021, 2019, 2016, 2013, 2010, 2007, etc. versions.

Use SysTools Software to Make the OST File Importable in Outlook

This software has come into existence to import OST file into Outlook 2021 / 2019 / 2016 / 2013 / 2010 / 2007 / 2003. It performs the migration process in bulk and brings forth so many interesting features to make this task more convenient.

It is possible to add OST files, which are corrupted or damaged, via this tool. Moreover, the integrity of the data remains intact. No data loss takes place, and any user can perform the conversion process using SysTools Converter for OST to PST.

The tool has a very simple interface and is compatible with all versions of the Windows Operating system. Also, the utility is a complete solution to deal with the OST to Outlook transfer process. Some of the most required features are listed below:

  1. Import the OST file into Microsoft Outlook without a User Account
  2. Capable of importing complete data from OST to Outlook At Once
  3. You can import encrypted OST files into Microsoft Outlook
  4. It supports importing corrupt OST in Outlook All Versions
  5. Attach OST in Outlook Without an Exchange Server Environment

Quick Steps to Import OST File to Outlook

After knowing all the benefits of using this software. Let’s move to the working steps to import OST to Outlook. follow the steps:

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Step-1: Download the Software Install it on your system, and click on Add File.

load ost file into outlook

Step-2: Browse OST files using the software panel (Use Search OST feature)

preview ost data

Step-3: Preview complete data from the OST file with all attributes. (After previewing, if your priority is collecting specific data, such as learning email addresses extraction from Outlook files, it’s time to plan your data usage).

open file

Step-4: Select PST as the output file type and click on the Export button.

add ost to outlook

Step-5: Finally, Import the output file generated from OST in Outlook 2021, 2019, 2016, 2013, 2010, 2007, etc., versions.

outlook import export

OST to Outlook import

Step-6: Choose Import from another program or file from the pop-up window and hit Next.

choose import option

Step-7: Now, an Import a file window will appear, choose the Outlook Data File (.pst) option and hit Next.

ost to outlook import

Step-8: Now it’s time to browse the PST file that you have created in step 4. Hit the Browse button and navigate to the location, and select the PST file.

ost to outlook free

Step-9:  Select the PST file from your system and hit the Open button.

import to outlook

Step-10: Select the option as per the requirement and finally click the Finish button.

import ost to outlook completed

Import process completed successfully, now you can easily access emails and other attributes of OST file into Outlook.

How do I Import OST File to Outlook – Users’ Queries

I am sure that from the above discussion, you can clearly understand the difference between using a free solution to import Exchange Server OST in Outlook and using trusted software. Now, let’s understand the situation from users’ comments. The queries taken from different discussion sites:

“Hello Experts, My name is Mack John. My friend gave a users .ost file in pen drive. Now I want to use it in my Outlook 2016. But I am unable to import it in my Outlook. So, I want to know how do I import OST file in Outlook 2016? “

“I am not in a condition to access Microsoft Exchange server environment. I have 20 user’s mailbox.ost file. All I want to import it in My personal Outlook account. kindly suggest me a working solution to import OST into Outlook 2013.”

“One of my best friends asked me, can you import OST file into Outlook. I know some free techniques to do this. I did the same as suggested, but the inline images were missing in resultant file. Luckily he has the backup of OST file. I used SysTools utility to attach OST in Outlook in a hassle-free way.”

To Sum It Up

OST files store the crucial data of the Exchange Server. However, performing this import process is not easy. Users have to face certain challenges for this. Considering this, we have discussed some manual procedures to import OST files into Outlook versions.

As a matter of fact, every manual trick has some or the other drawback; it is suggested to use a trouble-free alternative to add an OST file to Outlook 2021, 2019, 2016, 2013, 2010, 2007. With the help of this solution, the entire process will become quick and less complicated.

The post Import OST to Outlook Classic and New Outlook for Windows appeared first on SysTools Software.

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How to Merge Duplicate Contacts in Outlook Quickly? https://www.systoolsgroup.com/updates/merge-duplicate-contacts-in-outlook/ Tue, 06 Jan 2026 02:28:35 +0000 https://www.systoolsgroup.com/updates/?p=5005 If you’ve found duplicate contacts in the Outlook address book, but you can’t put them in trash. No problem, in this article, we’ll share with you how to merge Outlook

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If you’ve found duplicate contacts in the Outlook address book, but you can’t put them in trash. No problem, in this article, we’ll share with you how to merge Outlook contacts using both seamless manual and automated methods to clean up your contact list and to get Outlook’s best performance. Let’s walk through the article.

Duplicate contacts in Outlook can cause chaos and clutter your address book, which can be confusing while emailing, resulting in a waste of both time & effort. These duplicates may occur due to a sync error, import, or simply adding the contact a second time. Regardless of the cause, you need to know how to merge contacts on Outlook into one single contact via a reliable & effective tool.

Instant Solution: How to Merge Outlook Contacts?

To merge duplicate Outlook contacts quickly in no time you should follow these steps:

  1. Download a Professional tool like SysTools PST Merge Software.
  2. You can use Outlook built-in feature, which allows Outlook merge contacts.
  3. Or, try Export/Import method for Outlook combine contacts.

Download Now Purchase Now

Why Is There a Need to Merge Outlook Duplicate Contacts?

  1. Avoid Confusion and Miscommunication
  2. If you’re sending email messages, there is a chance that you could make a mistake if you want to send someone, but the mail goes to someone else, as it has a similar name. There is a need to merge duplicate Outlook contacts, which can prevent confusion and misunderstanding.

  3. Improve Search Efficiency
  4. If you’re looking for a contact, there may be multiple entries for the same contact, which can make it difficult to find or identify the real one. If you have merged your records and taken away duplicate contacts, you can find what you are looking for faster.

  5. Enhance Professionalism
  6. Multiple duplicate contacts make Outlook unprofessional. When you merge Outlook contacts, your address book or contacts list becomes organised and well-structured, which can be easily accessible.

  7. Prevent Syncing Errors
  8. When syncing Outlook with devices or third-party applications (Gmail and iCloud), duplicate contacts can result in synchronisation issues or worse–data corruption across platforms.

  9. Reduce Mailbox Clutter
  10. Like getting rid of spam or old emails, merging duplicate Outlook contacts reduces clutter and improves overall organisation in your mailbox and address book.

  11. Save Time and Boost Productivity
  12. Merge Outlook Contacts rather than wasting time filtering duplicates or fixing them, which can save time and also boost Outlook’s performance.

What Causes Duplicate Contacts in Outlook?

Before we get into methods, it’s important to understand why Outlook have duplicates and why there is a need to merge them. So, here are the common reasons explained below:

  • Importing contacts multiple times

When a user is importing any PST/OST file multiple times without choosing the ‘do not import duplicates’ option, Outlook generates duplicate contacts.

  • Syncing Outlook with multiple devices or third-party apps

Connecting Outlook with mobile phones, tablets or any third-party providers like iCloud or CRM tools, can cause sync errors as a result of duplicate contacts which get created.

  • Manual creation of similar contact entries

Sometimes, users don’t know about already existing contacts, as there may be a little difference in their emails or names, but Outlook will consider them to be separate contacts.

  • Improper Outlook rules or data migration

When migrating contacts in Outlook from an outdated version or using the wrong Outlook rules, it can easily create duplicate entries automatically.

4 Best Methods Used to Combine Duplicate Contacts in Outlook

In this section, we’ll know how to merge duplicate contacts in Outlook using 4 best & effective methods, which are given below with explantion.

  1. Use Outlook’s Built-in Merge Feature
  2. Export, Clean, and Re-import Contacts
  3. Merge Contacts Using the People Pane
  4. Using a Professional Tool

Let’s discuss them quickly:

Method 1: Use Outlook’s Built-in Merge Feature

This method allows users to merge duplicate Outlook contacts manually by combining their information.
Steps to use:

  1. Open Contacts tab in Outlook.
  2. Select all Duplicate contacts.
  3. Open one of the contacts and drag the duplicate onto it.
  4. Outlook will ask if you want to merge the contact details.

Pros:

  • Easy for a small number of duplicate lists.
  • No installation of any software is required.

Cons:

  • Time-consuming for larger address books.
  • If names are slightly different, it is easy to miss duplicates.

Pro Tip: You can also take an action like if you want to delete the merged duplicate contacts, you should use SysTools Outlook Duplicate Remover which can help to identify and remove duplicate contacts in outlook‘s list.

Method 2: Export, Clean, and Re-import Contacts

This is a more technical way to manually merge contacts in Outlook using Excel.
Steps to use:

  1. Navigate to File > Open & Export > Import/Export.
  2. Export your contacts to a CSV file.
  3. Open the .csv file in Excel and either manually merge duplicate rows.
  4. Save the file, and re-import it to your Outlook contacts.

Pro Tip: If you want to export your contacts to gather email addresses for list building, migration, or backup, this article will help you to extract email addresses from Outlook easily.

Pros:

  • More control of your data
  • It’s great for bulk merging or combining.

Cons:

  • It needs some technical knowledge to operate Excel.
  • Easy to create formatting errors.

Method 3: Merge Contacts Using the People Pane

The People Pane is another way to merge Outlook contacts.
Steps to use:

  1. Open an email from the contact.
  2. In the People Pane, click on Contact’s name.
  3. If there are duplicates, Outlook may display linked contacts that can be merged.

Pros:

  • Easy to use when looking at contacts in email.
  • Helpful for finding “Hidden” duplicates.

Cons:

  • It may not be accurate.
  • Not available in all versions of Outlook.

Note: As these manual methods have their limitations, to prevent these consequences to merge Outlook contacts. You should opt for the automatic method to save time and avoid the risk of loss of data.

Method 4: Use an Advanced Tool to Combine Contacts in Outlook

If you’re working with many thousands of duplicate contacts, we suggest using SysTools Outlook Merging Software, which allows you to merge similar contacts in Outlook very easily and efficiently. This automated tool can merge contacts on Outlook without any risk of losing data. This software helps you to manage multiple PST files in Outlook by combining and merging duplicate entries. Let’s take a look at its steps to get to know it more easily.

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How to Merge Contacts in Outlook: Step-by-Step

  1. Download and launch the software on your device.
  2. launch

  3. Click on Add File & Folder option to add a PST file.
  4. add

  5. Press Next, then select Merge tab.
  6. next

  7. Choose Merge in New PST, an Existing File or an Outlook Profile option.
  8. merge

  9. In Select Item Types, select Contacts for Outlook combine contacts.
  10. select

  11. Tick the Skip Duplicate Items checkbox and save Specific Criteria.
  12. skip

  13. Click OK to combine contacts in Outlook PST file successfully.
  14. ok

Read Also: How to Merge Calendars in Outlook?

Conclusion

In this article, we’ve discussed how Outlook merge duplicate contacts with both manual and automatic methods effectively. For large-sized data, which is experiencing ongoing synchronization issues, we would suggest that you go for the aforementioned tool rather than manual methods, as it can do its work very easily, quickly, and safely. Keep your Outlook address book clean for effective performance and communication as well.

FAQs on Merge Outlook Contacts

Q.1 Can I Restore Deleted Contacts?

A. You can if you’ve taken a backup before merging duplicate contacts.

Q.2 How Do You Merge Contacts in Outlook?

A. You can follow these steps to Outlook merge contacts:

  1. Open Outlook
  2. Choose the Google Account where you want to merge Outlook contacts.
  3. Click on Fix & Manage > Merge & Fix.
  4. Press Merge Duplicates.

Q.3 How to Combine Outlook Contacts in a Few Steps Using an Automated Tool?

A. To combine contacts in Outlook using dedicated software designed by SysTools. You can follow these steps:

  1. Install the Aforementioned utility.
  2. Select the Merge option to combine contacts in Outlook.
  3. Choose Advanced options like New PST, Outlook Profile & Existing PST File.
  4. Tap on Next button to Outlook combine contacts.

The post How to Merge Duplicate Contacts in Outlook Quickly? appeared first on SysTools Software.

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How to Increase Outlook Data File Size Limit (PST & OST)? https://www.systoolsgroup.com/updates/increase-outlook-pst-file-size-limit/ Sun, 04 Jan 2026 07:08:26 +0000 https://www.systoolsgroup.com/updates/?p=17152 Running out of space in Outlook? The default PST and OST file size limit can quickly fill up if you receive emails with large attachments. This guide explains how to

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Running out of space in Outlook? The default PST and OST file size limit can quickly fill up if you receive emails with large attachments. This guide explains how to increase Outlook data file size limit using the Windows Registry Editor, archive old emails, compact Outlook data file, divide your large data files, change “Mail to Keep Offline” setting, and other methods.

Along with that, you’ll learn the default size limits for each Outlook version and how to safely modify the registry entries (MaxFileSize, WarnFileSize, etc.) to expand the capacity of your Outlook data files without any data loss, other manual techniques, or drawbacks.

There are various cases when you need to increase Outlook data file size limit beyond the default size available. If you receive lots of emails a day with larger attachments, it can result in size limit issues. Here in this blog, you can see the complete process one by one.

Let’s understand the file size of Outlook data files according to versions for better understanding:

  • Outlook 2002 & earlier – 2 GB (ANSI – Cannot be increased)
  • Outlook 2003–2007 – 20 GB (UNICODE – Maximum 50 GB)
  • Outlook 2010–2021 – 50 GB (UNICODE – Maximum 50 GB)
  • Microsoft 365 – 50 GB (UNICODE – Maximum 50 GB)

Can You Really Increase Outlook Data File Size?

Yes, you can increase outlook pst size limit within Microsoft’s allowed range. Microsoft allow users to increase the maximum size of PST and OST files by modifying Windows Registry values and other methods. But these techniques don’t improve Outlook performance and contains high risk of corruption. You can use automatic tools according to your reequipments. These are the techniques to increase Outlook PST size limit:

  • Windows Registry Editor
  • Archive Old Emails
  • Divide Data Files
  • Compact Outlook Data File
  • Change “Mail to Keep Offline” Setting
  • Delete & Rebuild OST File

Method 1: Windows Registry Editor to Increase Mailbox Size

This is the perfect method to increase Outlook data file size just by changing the registry. Follow the mentioned steps one by one:

Important Note: Microsoft doesn’t support to increase Outlook PST size limit using the Registry, because it contains a high risk of corruption.

These are the four registry entries that allow you to limit the size of Outlook .PST and .OST files:

  • MaxFileSize registry entry – It determines an absolute maximum size for .PST and .OST files, up to which they can grow. The Outlook does not permit the size of the data file to grow beyond this maximum size.
  • WarnFileSize Registry Entry: It determines the maximum data an Outlook data file can have. When this maximum data is reached, the Outlook .PST or.OST files are not permitted to add any more data. But there can be an increase in the physical file size because of internal processes.
  • MaxLargeFileSize Registry Entry: To set the maximum size up to which an Outlook data file can be expanded (only for UNICODE files).
  • WarnLargeFileSize Registry Entry: To set the maximum allowable data for Outlook data (PST / OST) file (only for UNICODE files).

Important: Incorrect registry changes may cause system instability. Make sure you have a backup copy of your data file before proceeding to increase Outlook data file size.

  1. Choose “Windows + R” and type “regedit” and hit the “Enter” button.
  2. Now, find the Outlook version key:
    HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\PST
    (Replace 16.0 with your Outlook version)
  3. Right-click on the >> New >> DWORD (32-bit) Value.

    outlook registry dword

  4. Next, create these entries:
    Outlook Version Policy location for registry entries in Registry Editor
    MaxLargeFileSize Maximum PST/OST size
    WarnLargeFileSize Warning threshold
  5. Now, set the values in Decimal (MB):
  6. And finally, restart your Outlook account.

Limitations:

  • Increasing the Outlook data file does not improve performance.
  • These methods increase the risk of corruption of data files.
  • Microsoft does not recommend exceeding reasonable limits.

Method 2: Divide Large Data Files

If your Outlook mailbox is full and contains your crucial data. In simple words, you don’t want to lose any data, so use the SysTools PST Splitter Tool. This software allows users to split PST file into smaller parts of MB, GB, and TB. It’s the best option to increase Outlook PST size limit without removing or deleting any data. Also, there is no risk of corruption and data loss, because it keeps your data separate and managed. Download the free edition now:

How to Increase PST File Size?

  1. Download and run the solution.

    increase outlook data file

  2. Add your files/folders using the given options.

    add files

  3. Select the location to save the file using the Browse icon.

    location

  4. Choose Options as per choice.

    saving options

  5. Protect your data file and choose the Split icon.

    protect your data file

Method 3: Increase Outlook Data File Size by Archiving

If your goal is to manage and organize your data, then archiving would be the best option for you. You can archive and keep your crucial emails and data safe for future access:

  1. Head to the “File” tab in Outlook.
  2. Choose “Tools” >> “Clean Up Old Items” options.
  3. Select a folder that you want to archive.
  4. Select any date according to your requirement.
  5. After that, choose location and save the archive PST file.
  6. Finally, select the OK button to increase Outlook data file size.

Limitations:

  • This method creates multiple PST files.
  • You can’t search anything within the file until it is opened.
  • It doesn’t archive your OST file data.

Method 4: Compact PST/OST Data Files

Compacting Outlook data files means it removes the extra space from the PST/OST data files.

  1. Open your Outlook account.
  2. Choose the “File” >> “Account Settings” > “Data Files” options.
  3. After that, select the “PST/OST” file.
  4. Choose the “Settings” >> “Compact Now” options.

Drawbacks

  • It doesn’t increase Outlook PST size limit.
  • Time-consuming process for large data files.
  • Minor reduction for heavily used files.

Method 5: Increase OST File Size by Changing “Mail to Keep Offline”

This technique helps to reduce OST file size, especially for Microsoft 365 and Exchange users.

Important Note: This method only downloads recent emails instead of the full mailbox.

  1. Choose the “File” tab in Outlook.
  2. Choose the “Account Settings” option.
  3. Select the “Exchange/Microsoft 365” account.
  4. Hit the “Change” icon.
  5. Adjust the “Mail to Keep Offline slider” (e.g., 6 months).
  6. Now restart your Outlook to increase Outlook data file size.

Method 6: Delete and Rebuild OST File

  1. First, close your Outlook completely.
  2. Choose the OST file location.
  3. Delete or rename the OST file.
  4. Restart your Outlook account.
  5. And finally, Outlook will create a new OST file automatically.

Limitations

  • Required a stable internet connection.
  • A large mailbox will take a long time to resync.
  • Not suitable for PST file.

Method 7: Duplicate Emails

If your mailbox is filled with duplicate emails, and you are not able to remove them, then download the SysTools Outlook Duplicate Remover Tool. This is the best solution, which allow remove and save them locally according to your choice. Users can remove duplicates from Mail, Calendar, Tasks, Contacts, Journal, and Notes. Download the free demo versions.

How to Increase Outlook PST Size Limit?

  1. Download and start on your system.

    tool

  2. Add your data files and folders.

    add your data files

  3. Choose between “Within Folder(s)” and “Across Folder(s)” options.

    options

  4. Select the folders according to your needs.

    folders

  5. Choose the “Filters” as per your choice.

    filter

  6. Choose “Data Range” to export selective data.

    date range

  7. After that, select the “Action” as needed.

    action option

  8. Finally, select the “Next” and “OK” buttons.

    increase outlook data file

Best Practices to Avoid Outlook Size Issues

Here are some best practices to avoid the large mailbox size issue:

  • Keep your PST/OST file under control.
  • Archive your old emails regularly.
  • Try to avoid keeping your large attachments.
  • Compact your data files periodically.
  • Use multiple PST files instead of one large file.

What if the PST File Get Corrupted?

The Microsoft Outlook PST file becomes damaged and inaccessible due to recurring PST corruption issues. One major reason for PST file corruption is overwriting a PST file due size limitation problem. But in the latest versions, users face the same problem. The only way to fix an increased Outlook data file size issue. SysTools has a leading solution for resolving Outlook PST file issues. The Outlook Recovery Software can fix highly corrupted data files. Download the software, scan, and repair Outlook PST file in a few simple steps.

A PST data file can be corrupted by multiple reasons. The oversized PST file issue is only one among them. But the software suggested above a help to fix PST data issues irrespective of the cause. It is an all-in-one solution for MS Outlook users.

Let’s Conclude

If you frequently deal with large mailboxes, increasing the Outlook PST file size limit through registry modification, archiving old emails, dividing data files, compact Outlook data file, change “Mail to Keep Offline” setting, and delete & rebuild OST file are the best techniques.

You can use an automated solution as well to divide your large data files and remove duplicate emails according to your needs. You can select any technique as per your requirements. For any query, you can contact us through chat support.

The post How to Increase Outlook Data File Size Limit (PST & OST)? appeared first on SysTools Software.

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How to Combine PST Files Without Duplicates? Instant Guide https://www.systoolsgroup.com/updates/combine-pst-files-without-duplicates/ Thu, 01 Jan 2026 15:35:51 +0000 https://www.systoolsgroup.com/updates/?p=11235 Are you facing difficulty in merging PST files because duplicates appear in the mailbox? If yes, then in this article, we will discuss how to combine PST files without duplicates

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Are you facing difficulty in merging PST files because duplicates appear in the mailbox? If yes, then in this article, we will discuss how to combine PST files without duplicates using effective and quick solutions. Due to an upgrade in Outlook, your data becomes large, which leads to an Outlook mailbox full. So, without deleting important data, it’s important to combine multiple PST files without duplicates. Before jumping to solutions for merging Outlook PST files, let’s see a query by a genuine user of MS Outlook to understand more about the problem.

User Query – How Can I Combine PST Files Without Duplicates in Outlook?

“I have multiple accounts configured in my Outlook Application. Some of my emails & contacts, as well as calendars, are saved twice in these folders. I want to merge multiple Outlook PST files and eliminate duplicates, but not getting any reliable solution. The main problem while combining these Outlook files is removing duplicates. Can anybody suggest a technique so that my work becomes easier?”

It’s very clear from the user query why users need a reliable solution to combine Outlook emails, contacts, calendars and other items without duplicates. Not to worry, we’re going to tell some of the best ways and tips to solve the merge PST files without duplicates problem using both manual and automated approaches.

Advanced Solution to Combine PST Files Without Duplicates

If you want to merge PST files without duplicates effectively and reliably. We recommend using the SysTools PST Merge Tool. It’s the best professional software which comes with advanced features, as it can easily combine large Outlook files without losing any important data.

Download Now Purchase Now

This tool offers a very simple and easy-to-operate user interface, which helps both technical and non-technical users to use the software seamlessly without learning any technical skills. It effectively manage multiple PST files in Outlook, such as 2021, 2019, 2016, 2013, and other versions by merging the files into one.

Let’s walk through its working guide.

Step-By-Step Guide to Merge PST Files Without Duplicates

Follow these simple steps to resolve the problem:

  1. Install and run the tool and upload PST File and Folder.
  2. add

  3. Choose the Merge Option and click Next button.
  4. merge

  5. Select Merge All Folders or Selected Folders as per the needs.
  6. all

  7. Choose Merge in New PST, Existing PST, or Outlook Profile.
  8. new-pst

  9. Tick Skip Duplicate Items to eliminate duplicates from the mailbox data.
  10. skip

  11. Finally, press Next button.
  12. next

Advanced Features of this Professional Tool

Here are other interesting features mentioned below:

  • Option to Consolidate Password-Protected Outlook PST.
  • Easily Fetches Data from Complex PST Files.
  • Only Merge Duplicate Contacts in Outlook.
  • Supports Multiple File and Folders with N no. of PST.
  • Maintains Data Structure Integrity.
  • Offer Dual Options: Merge and Join PST
  • Split PST option to break data into small sizes.
  • Supports all versions of Outlook and Windows OS.
  • Able to Combine Outlook Archive files.

Manual Solution to Combine PST Files Without Duplicates

If you want a money-less approach, then choose manual solutions. You can follow the steps mentioned below to combine multiple Outlook PST files and to eliminate duplicates.

This manual method involves a two-step process:

  • Create a PST file
  • Transfer the data into the file

Let’s go through each step one by one.

1) Create Blank PST

  1. Navigate to your “Microsoft Outlook Profile” and click on “New items”.
  2. A drop-down list will be displayed. Select “More Items”.
  3. A dialogue box will appear, select “Outlook Data File”.
  4. pst

  5. A new desired location will arrive to save a new blank PST to the desired location.
  6. In the end, select OK button.
  7. ok

2) Move Old PST to Newly Created PST

Go for the below-mentioned steps to complete the task to combine PST files without duplicate emails, contacts & calendars.

  1. Open Outlook 2021 or any other version again and go to File menu.
  2. Select Open & Export button after going to Import/Export.
  3. A new window of Import–Export wizard will be displayed. You have to select Import from another program.
  4. import

  5. After select Next button to combine PST files without duplicates.
  6. Go to File type, choose Outlook Data File (PST) to import from your local storage.
  7. pst

  8. Reach to location of the file where you have saved your PST that needs to be merged.
  9. In the next window, select the “Do Not Import Duplicates” option so that no duplicates will be created during the process.
  10. Then, go to Next button.
  11. Select the Destination Location where you want to save your combined folder
  12. Finally, navigate to Finish button.

Note: You can consider this a limitation, as you need to repeat the same process for each PST file, which you need to merge along with the mailbox data item.

Read More: How to Merge Multiple Email Accounts in Outlook

Conclusion

In the above article, you have understood how a user can easily merge PST files without duplicates using both professional-suggested and manual solutions. Users can opt for any approach according to their requirements. But it is highly suggested by an expert to use the aforementioned advanced software for more accuracy and reliability. It’s specially developed for combining Outlook emails, contacts, calendars, notes, and other data items.

FAQs on Combine PST Files Without Duplicates

Q.1 Can I Merge Data Files Along with Removing Duplicates?

A. Yes, you can join multiple PST files using the automated tool mentioned above. Also, for eliminating duplicates, you can use SysTools Outlook Duplicate Remover Software.

Q.2 How to Manually Combine Multiple Outlook PST Files?

A. One can easily combine several Outlook data files using manual methods. First, create a new empty file and then import all existing data into the new PST file.

Q.3 Does this Tool Join Duplicate Contact Entries?

A. Yes, this tool combines all duplicate contacts in Outlook version whether it’s 2019, 2016, 2013, 2010, or 2007.

The post How to Combine PST Files Without Duplicates? Instant Guide appeared first on SysTools Software.

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Here’s How to Migrate Outlook OLM to Apple Mail https://www.systoolsgroup.com/updates/transfer-outlook-for-mac-olm-to-apple-mail/ Thu, 01 Jan 2026 07:57:39 +0000 https://www.systoolsgroup.com/updates/?p=4303 Microsoft Outlook is a user-friendly desktop-based email client available for Mac and Windows platforms. Due to some reasons, there are a number of Mac Outlook users who want to migrate

The post Here’s How to Migrate Outlook OLM to Apple Mail appeared first on SysTools Software.

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Microsoft Outlook is a user-friendly desktop-based email client available for Mac and Windows platforms. Due to some reasons, there are a number of Mac Outlook users who want to migrate from Outlook for Mac to Apple Mail. However, both the email program supports different file formats i.e., OLM & MBOX formats respectively.

That is why users cannot directly move to the Mac Mail email client. To do this, users need to first convert OLM files to Apple Mail supported MBOX format.

Therefore, in this post, we are going to discuss various approaches that can import OLM to Apple Mail easily.

Now, let us understand this scenario with the help of a user query:

“Hello, I use Mac Outlook for many years. But in the last month, it becomes so slow. To resolve this issue, I uninstall and reinstall Mac Outlook 2016, but the problem is constant. So, I have started to use Mac Mail as my default email client. And I realize it is more simple than Mac Outlook. Thus, I am planning to migrate my old .olm file into Mac Mail. Can anyone suggest to me how to import Outlook OLM to Apple Mail program? Any relevant help would be appreciated!”

Potential Reasons to Import Outlook OLM to Mac Mail

There is no “one” specific reason for Mac Outlook to Apple Mail migration. Multiple scenarios are responsible for where users feel the need of importing Outlook OLM file into Mac Mail application. Some of them are listed below:

  • Manage old OLM files into Apple Mail email client that the user currently works with.
  • Occurrence of different errors in Mac Outlook causing the user to switch to Mac Mail.
  • Change in organization leading to switching of email client from Outlook for Mac to Apple Mail.

Manual Method to Migrate Outlook For Mac to Apple Mail

The traditional method takes advantage of the fact that Outlook for Mac has an option to create MBOX files. Since Mac Mail supports this MBOX file, it makes it easier to perform the conversion process. The method is divided into 2 parts:

Part 1: Exporting data from Outlook for Mac OLM

  • To start the process, launch Outlook for Mac on your system.
  • After that, choose the mailbox that you wish to migrate from Outlook to Mac Mail program.
  • Then, drag and drop the selected mailbox to the desktop interface. It will automatically save in MBOX file format.
  • After that, repeat the above steps until all the mailboxes are converted into MBOX files.
  • Then, keep all the MBOX files in one folder.
  • At last, exit Outlook.

Part 2: Import the OLM data into Apple Mail on Mac

  • Start Apple Mail.
  • Then, select the File >> Import Mailboxes… option.
    click on import mailboxes
  • As soon as you click on the Mailboxes, a new dialog box appears on the screen. Select Files in mbox format option from the dialog box and click on Continue.
    select files in mbox format
  • Then, browse the folder that comprises all MBOX files. Then, click on Choose to continue the process.
  • A new window display that previews all .mbox files. If you want to exclude any mailbox then uncheck the box corresponding to that mailbox.
  • Finally, click on Continue to import MBOX into Mac Mail.
    click continue
  • The files are now visible under the Import section.
    find the mbox files in import section

Limitations of the Manual Method

The above-described solution that converts OLM files into Apple Mail has some shortcomings that are listed below:

  • Users cannot import orphan .olm file into Apple Mail program.
  • It requires Outlook for Mac application to execute the process.
  • It is not effective to import bulk OLM files into Mac Mail client.
  • Takes a huge amount of time to complete the migration process.

Expert Solution to Migrate Mac Outlook OLM to Mac Mail

If a user is looking for a simple and reliable solution to import OLM to Apple Mail, try a professional solution. Mac OLM Converter is one such application that let users migrate Outlook for Mac to Apple Mail in no time.

Download Now Purchase Now

It is particularly designed to convert Mac Outlook OLM file into format compatible with Apple Mail within a few clicks. Besides this, it exports .olm file into 9+ file formats. The key features of the software are as follows:

  • Successfully export mailboxes of Mac Outlook in batch
  • Able to move selective OLM file data into desired file formats
  • The software creates a complete report of the entire conversion
  • Permits to export selected mailboxes using the data filter option
  • Export OLM emails, contacts, calendars, tasks and notes as per requirements
  • Provide option to split PST file into smaller parts
  • Easily convert Outlook 2019/2016/ 2011 OLM files into Mac Mail
  • Supports all the latest versions of Mac OS i.e., Mac OS X 10.8 & all above versions.
  • In addition to that, it is compatible with all the latest versions of Windows Operating System.

Steps to Import OLM file into Apple Mail

  • Step 1.) First, download & launch the OLM to MBOX Converter on the Mac machine.
    start the tool to import olm to apple mail
  • Step 2.) Then, upload the OLM file(s) in the software by clicking on the “Add File / Add Folder” button and click on the Next button to continue.
    add olm files into the software
  • Step 3.) After that, select the MBOX file format from “Select Export Type” and choose to maintain folder hierarchy, if required.
    select mbox format
  • Step 4.) Then, click on the Advance Settings button and set multiple options like categories and date filters to customize the conversion process.
    apply advanced settings
  • Step 5.) Then, provide the destination location for the resultant data file.
    change the destination address
  • Step 6.) Finally, click on Export to start converting OLM file to Mac Mail supported format.
    click export to migrate olm to apple mail
  • Step 7.) Once the process completes, open the destination location to find the converted MBOX file.
    import olm to mac mail
  • Step 8.) At last, import this MBOX file in Apple Mail by going to File >> Import Mailboxes >> Files in MBOX format.

Bringing It All Together

In this post, we have described two methods that can migrate OLM files into Mac Mail. Moreover, if the user wants a quick solution that can import bulk OLM files to Apple Mail, then it is recommended to choose the automated solution. It provides a 100 % conversion rate without changing the original file structure. So, it depends upon the users which method they find more suitable.

Frequently Asked Questions

Q. How to import OLM files to Mac Mail using the software?

A. Here’s how to execute it:

  • Step 1: Click “Add File” to import OLM file.
  • Step 2: Select “MBOX” for Apple Mail.
  • Step 3: Apply “Advance Settings” to OLM file.
  • Step 4: Click “Export” to import OLM to Apple Mail.

Q. Which is better Mac Outlook or Apple Mail?

A. There are multiple factors depending on which a user make choice between the two. But, in order to have a proper idea go through Microsoft Outlook for Mac vs Mac Mail comparison.

Q. Can I access the resultant MBOX file on any supporting application?

A. Yes, you can open MBOX file in any application that supports MBOX like Apple Mail, Thunderbird, Eudora, etc.

The post Here’s How to Migrate Outlook OLM to Apple Mail appeared first on SysTools Software.

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