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 Troubleshoot Office 365 Sync And Login Issues problem. It is located in the folder of your original Personal Folders (.pst) file.

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

• If you can't start the Inbox Repair tool automatically or manually, you may try to repair your Office application.
• In this 2025 guide, we’ll show you how to repair the Outlook OST file and restore seamless email performance without losing important data.
• If Outlook is unresponsive, not opening, or is crashing without any morning you can repair using the tried and tested methods provided here.
• If your Outlook suddenly stopped opening after a Windows update, don’t panic.
• While carrying out the above methods it is advisable to close Outlook beforehand.

Last but not least, you can try to repair Outlook PST files using the ScanPST tool or using a specialized Outlook repair tool. If you Office 365 sync problems and login fixes cannot import the Newname.pst file into Outlook, unfortunately you have lost all the information that is not in the Lost and Found folder. FixTechGuide’s free email diagnostic tools automate error detection by scanning your configuration files, registry entries, and mail protocols. The platform validates SMTP, IMAP, and POP3 settings against verified databases to identify version mismatches or broken profiles introduced after system updates. A corrupted OST file can pause your business communication, but with these repair steps you can restore your Outlook in minutes.

Can I delete my OST file without losing data?

As soon as this operation is complete, other algorithms are run to collect all the orphaned messages and to put them in an Orphans folder. At a higher level, the more visible changes that you see involve folders and messages. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. The built-in Auto-Detect Utility ensures complete privacy—your credentials never leave your device.

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

Fortunately, most of these errors stem from configuration conflicts, corrupted data files, or outdated components that can be fixed with a few targeted steps. If your Outlook suddenly stopped opening after a Windows update, don’t panic. Most startup failures arise from minor configuration mismatches or outdated components. Following the above steps—from safe mode diagnostics to repairing data files—will restore functionality in most cases. Repairing Outlook’s .OST and .PST files often restores full mailbox synchronization and prevents email loss.

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

If this method works, try disabling your add-ins and any recent customizations that you may have made in Outlook to permanently fix the issue. If the issue continues to trouble you, then you have to continue with the solutions mentioned below. Find solutions to common problems or get help from a support Office 365 sync problems and login fixes agent. The recipient display properties are changed to be consistent with the recovered recipient table.