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Opened Oct 25, 2025 by Eldon Goodwin@eldongoodwin60
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How to repair corrupted pst file Microsoft Outlook 365 Microsoft Q&A

This synchronization occurs automatically and transparently, allowing you to work seamlessly between online and offline environments. You can also enable the OST file by turning on or turning off the Cached Exchange mode in Outlook. At a higher level, the more visible changes that you see involve folders and messages. If ScanPST determines that a specific block of the structure or table is unreadable or corrupted, ScanPST removes it.

These Outlook data (PST) files store user’s data, including email messages, calendars, tasks, journals, etc. By following these steps, you should be able to resolve the ‘Something is wrong with your data files’ error. Also, regain access to your email account and mailbox data. Once your task is done of locating the ScanPST.exe tool, kindly head to follow the below-given steps to fix Outlook data files (PST).

Bookmark this page so that whenever you come across an error like your Outlook calendar not syncing, or a corrupted file, you'll have a place to start troubleshooting. If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account. Availability has recovered, and engineers are investigating the root cause and identifying problematic servers. The team is sweeping all remaining capacity to identify and address residual issues. You can use the Inbox Repair tool (SCANPST.EXE) to diagnose and repair errors in your Outlook data file. The Inbox Repair tool checks the Outlook data files on visit Fix Outlook Site your computer to see if they're in good shape.

These dialog boxes often don’t allow Outlook to respond properly, so check for any open dialog boxes on your system. By installing add-ins in Microsoft Outlook, you can combine the application with extra features or functionalities that were not available by default. The navigation pane is the leftmost pane in Outlook where you'll find your folder list and the icons to move between Mail, Calendar, People, and Tasks.

This alias will be added to their account as a secondary alias, with the original 3rd party alias will continue to be set up as the primary. Once this step is complete, the user will land in their Outlook inbox and be able to use all Outlook functionality with this new email address. You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile. The folders storing all of your mail might be struggling to run because of how large they are.

It's incredibly common to have Outlook crash because of a corrupted PST file. There is nothing worse than when you are working on something important, you go to send off an email, and Outlook freezes or you see that dreaded "not responding" message. If your Outlook profile is listed under the Privacy tab, Spotlight will not index it. There are different steps to take if you are on Windows (you'll need to locate the Search Index) or Mac (use Spotlight). First, let's read about how to check if Outlook is indexing on Windows. The indexing feature is essentially a catalogue that is built from all of the information you receive in your email.

Then, right-click a selected file and choose "Delete" (a trash can icon). You might need to set Windows Update to automatically download and install recommended updates. Installing any important, recommended, and optional updates can visit Fix Outlook Site often correct problems by replacing out-of-date files and fixing vulnerabilities. To install the latest Windows and Office updates, click the link below. In Windows, Outlook not opening errors can disrupt email communication, which can negatively affect productivity and business operations.

Optionally, you can try to recover additional repaired items from the backup personal folder. You can use the Inbox Repair Tool (scanpst.exe) to repair corrupted Personal Folders (.pst) and Outlook Data (.ost) files. This is useful when your OST file is relatively big (more than 5 GB) and it would take a long time to recreate it. Also, it can be useful when you are getting errors when importing data from a PST file.

Start Outlook in safe mode to fix "Processing" screenIn Windows 10, choose Start, type Outlook.exe /safe, and press Enter.In Windows 7, choose Start, and in the Search programs and files box, type Outlook /safe, and then press Enter.In Windows 8, on the Apps menu, choose Run, type Outlook /safe, and then choose OK.

In some specific cases, we observed that the problem no longer stayed after deleting the Outlook App Data folder. Thus, you can try deleting the Outlook App Data folder and check whether Outlook functions in your case; follow the below process. After the scan is complete successfully, try to open Outlook 2016 again and check if it throws the same error message or is now working perfectly. Now, launch Outlook 2016 again and check if the issue persists or not, and if it does, you may follow up with other workarounds given below. You can choose to repair the program both online and offline, whichever solutions suit you best.

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Reference: eldongoodwin60/hermine2022#10