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 fix MFA prompts not working problem. It is located in the folder of your original Personal Folders (.pst) file.

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

• 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.
• ScanPST can only repair and fix minor corruption and issues in Outlook files.
• 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, disable faulty add-ins in Outlook fixing Outlook profile, and Repairing Outlook using Microsoft Office using the in-built tool.

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

Always close Outlook properly, maintain smaller data files, and use the SCANPST tool or SaRA assistant for preventive maintenance. If errors persist, deleting the OST file or creating a new Outlook profile usually resolves all sync-related issues. It automatically detects corrupted data files, fixes profile errors, and reconfigures Outlook to restore connectivity with Office 365.

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

By the end, you’ll know exactly how to restore your Outlook and prevent future errors. If your Microsoft Outlook won’t open after a recent Windows update, you’re online Outlook email repair utility not alone. Many users encounter startup freezes, profile loading loops, and crashes following major Windows patches or Office updates.