How Do I Repair Corrupted OST Files in Outlook 365?

THOMPSON01

New member
May 10, 2025
16
0
1
I am facing an issue where my Outlook 365 is no longer syncing, and after checking, it seems my OST file is corrupted. I tried restarting and repairing Outlook, but nothing worked. Can anyone guide me on how to safely repair a corrupted OST file in Outlook 365 without losing any emails or other data? Are there any reliable methods or tools you would recommend for this situation?
 

ishasingh

New member
Jun 25, 2025
7
0
1
To repair corrupted OST files in Outlook 365, first, close Outlook and navigate to the OST file location (usually in AppData\Local\Microsoft\Outlook) and delete the OST file. Restart Outlook to allow it to recreate the OST file automatically. If this doesn’t fix the issue or the file is severely damaged, use a reliable OST Recovery Tool that repairs and converts corrupted OST files to PST, ensuring complete data recovery without loss.
 

nick_juormer

New member
Jun 28, 2025
2
0
1
The simple process to repair corrupted OST files in Outlook 365 is to use a recovery tool, as you can attempt to repair OST files via the built-in tool that is ScanPST.exe, through which you can try to restore your Outlook data. But in case that option is not suitable for the repair of files, you can make use of GainTools OST Converter, which can help you out in this situation to repair all the OST files' data easily. This application is most trusted by professionals and experts. I am genuinely impressed with its working as it provides me with accurate results for OST file recovery as well as the conversion process. You can also try it for your damaged OST files.
 

herryjons

New member
Jul 1, 2025
1
0
1
Repair corrupted OST files in Outlook 365 with help of the professional solution, the TrustVare OST to PST Converter Software, which is easy to use for all users without technical knowledge. OST files are intended to keep offline versions of a user's calendars, emails, and other mailbox data. They are usually associated with a particular Office 365 or Exchange account. This implies that they are linked to the server and the account, which makes data backup and conversion challenging. PST files offer a more dependable backup option since they can be kept apart from the server. Exporting and importing PST files is simple and hassle-free. Therefore, I recommend the top software, which is user-friendly even for non-technical users. All versions of Microsoft Outlook and Windows OS are supported. Without limiting file size or erasing data, it converts corrupted OST files to PST format. The trial version is also available for free. It enables more flexible data management and converts OST files to PST files.
 
Last edited:

azekielrenjo

New member
Jul 3, 2025
1
0
1
You want to repair corrupted OST files in Outlook 365. It’s fixable. First, try restarting Outlook and your computer, as this can sometimes resolve a temporary issue. If that doesn’t help, you can use the Inbox Repair Tool ScanPST.exe, which is a free tool that comes with Outlook. butis not suitable for users and risk of data loss. So, I suggest the best soltuion you can try is the DataVare OST to PST Converter Software, which is the best way to convert from OST to PST without losing the order data of the folders and directly import in Outlook 365. It's simple to use for users who aren't techy to use. You can change as many OST files as you want to PST files without MS Outlook. Anyone with Microsoft Outlook or Windows OS can use it. You can start using the trial version of this program right away for free.