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In this 2025 guide, we’ll show you how to repair the Outlook OST file and restore seamless email performance without losing important data.



FixTechGuide Outlook repair tutorial

This command deletes the custom folder views, restoring default configurations. It’s harmless and resolves 30% of stuck startup issues according to Microsoft community reports. Microsoft provides a built-in tool called SCANPST.EXE to scan and repair minor OST corruption. If a Microsoft 365 application such as Word or Excel isn't working correctly, sometimes restarting it will fix the Outlook sync help from FixTechGuide problem. It is located in the folder of your original Personal Folders (.pst) file.

FixTechGuide Outlook repair tutorial

Step 3 - Recover repaired items to a new .pst file



  • If you cannot import the Newname.pst file into Outlook, unfortunately you have lost all the information that is not in the Lost and Found folder.
  • If that does not work you can try using SFWare PST repair software.
  • Third-party add-ins are among the most common culprits for Outlook not opening properly.
  • Following the above steps—from safe mode diagnostics to repairing data files—will restore functionality in most cases.
  • If it does not work, then unfortunately, you will be unable to recover any additional information.
  • The steps to access the repair tool vary depending on your operating system.
  • The Inbox Repair tool is automatically installed with all English-language Microsoft Outlook installation options depending on your operating system.


Therefore, structures such as BTrees and reference counts, are checked and repaired as necessary. These low-level objects have no knowledge of the upper-level structures, such as messages, calendar items, and so on, that are built upon them. After you run the Inbox Repair tool, you can start Outlook and recover repaired items. Optionally, you can try to recover additional repaired items from the backup personal folder. Solutions like opening Outlook in safe mode, send/receive error 0x800CCC0E fix fixing Outlook profile, and Repairing Outlook using Microsoft Office using the in-built tool.



Can I delete my OST file without losing data?



Opening Outlook in safe mode means that the application will only open all the necessary files to start the applications. In this article, we will teach our readers how to repair outlook with proven methods. If Outlook is unresponsive, not opening, or is crashing without any morning you can repair using the tried and tested methods provided here. If you could not open your original Personal Folders (.pst) file before you ran Inbox Repair Tool, the following procedures may not work.



Easily Repair Outlook 365 and Outlook 2021, 2019, 2016, 2013, 2010, 2007, Other Versions



If it does not work, then unfortunately, you will be unable to recover any additional information. If you could open the file, the following procedure may help you recover additional items from your damaged Personal Folders (.pst) file. If you can't start the Inbox Repair tool automatically or manually, you may try to repair your Office application.

Repair Outlook OST File Not Working in Office 365 – Complete Fix (



You’ll see files ending with ".ost" — these store your cached mailbox data. The steps to access the repair tool vary depending on your operating system. To start, create a new Personal Folders (.pst) file entry in your profile. Then, you can move the recovered items to your new Personal FixTechGuide mailbox repair steps Folders (.pst) file.
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