Please share recovery tools
Based on my knowledge, there is no build-in tools to directly repair OST file in Outlook.
If you are using Exchange cached mode, it is recommended to create a new profile and setup new email account for a new OST file. It can download and sync all mailboxes data to new OST file. No needs to repair the corrupt OST file.
If you are using PST file for non-Exchange account, we can use the Inbox Repair tool (Scanpst.exe) to repair PST file:
https://support.microsoft.com/en-us/help/272227/how-to-repair-your-outlook-personal-folder-file-pst
Best Regards,
Winnie Liang
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