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There may be items in the backup file that you might be able to recover that the Inbox Repair tool couldn’t. Open the OST file as per the location provided in the table. As you open it across the File Explorer, lead to the “View” menu from the top. There, turn FixTechGuide support for Office 365 on the option of “File Name Extensions” to display extensions.

Repair Outlook Data Files (.pst and .ost)

This is all most people will need, searching for older items will be slower but for daily use items it will still be quick. As you close them, lead to the folder and right-click on the OST file. Once you re-open Outlook, your OST file is automatically recreated or rebuilt. If your hard drive goes through any physical damage, it will damage the data across it too. A bad sector or corrupted hard drive can cause OST inaccessibility.

Outlook - OST file recurring corruption

The functionality is diverse, and it can be approached in multiple directions. When the case comes to rebuilding the OST file, there are several things to look out for. If guide to Office 365 sign-in errors you can open the original Outlook Data File, you might be able to recover additional items. The Inbox Repair tool creates a backup file with the same name as the original, but with a .bak extension, and saves it in the same folder.

If you know the location, click on the “Add File” tab and browse it.When the case comes to rebuilding the OST file, there are several things to look out for.You must re-select “Account Settings” when it opens across a drop-down menu.Find the .ost file that the error message reported to have errors, and then delete it and open outlook, it will recreate a new .ost file.The WebbyAcad OST Recovery Tool offers advanced features to fix damaged OST files and convert them to PST, EML, MSG and other formats while preserving folder hierarchy and metadata.Although the repair process might recreate some of the folders, they may be empty.As it is converted, you can easily view the contents of the data file.

What are the major Reasons of OST Corruption and how to Fix it

Fwiw, responding to my original post and how we addressed it for this user - we ended up creating new Outlook profile and limiting the amount of cached mail to 2 years. If the OST still gets corrupted when you have reduced the size there is something in the mailbox causing the problem. You must re-select “Account Settings” when it opens across a drop-down menu. There, lead into the “Data Files” tab and select your OST file. After selecting the file, click on “Open File Location” to redirect to the folder.

Method 4: Use OST Repair Tool

This article has provided an overview of how you can quickly rebuild an OST file. With the methods and Wondershare Repairit for Email, you can make cohesive use of the available resources. Get your OST rebuilt properly with Troubleshoot Office 365 Sync and Login Issues the help of the available techniques.