How to repair corrupt outlook.ost file?

[peterparker]

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Read More - Repair corrupt Outlook.OST file

[Akshay_M]

Repairing a corrupt Outlook .ost file can be done using the built-in tool provided by Microsoft called "ScanOST" or "OST Integrity Check." However, starting from Outlook 2013 and later versions, Microsoft replaced ScanOST with a new tool called "OST to PST Converter."

To repair a corrupt Outlook .ost file using the OST to PST Converter tool, follow these steps:

Close Outlook: Before you begin, make sure that Microsoft Outlook is closed.

Locate OST File: Find the .ost file that you want to repair. The default location of the .ost file is typically in the following path:

For Outlook 2019, Outlook 2016, and Outlook 2013:
C:\Users\<username>\AppData\Local\Microsoft\Outlook

For Outlook 2010 and earlier versions:
C:\Users\<username>\AppData\Local\Microsoft\Outlook

Note: <username> is your Windows username.

Rename the .ost file: To avoid confusion and keep the original file safe, rename the .ost file to something like "OutlookOld.ost."

Run OST to PST Converter:

For Outlook 2016 and later versions: Search for "OST to PST Converter" in the Windows Start menu and run the application.
For Outlook 2010 and earlier versions: The OST to PST Converter tool is usually located at this path:
C:\Program Files\Microsoft Office\<Office version>\SCANOST.EXE
Replace <Office version> with your specific Office version (e.g., Office14 for Office 2010).
Convert OST to PST: In the OST to PST Converter tool, click on the "Browse" or "Open" button and select the renamed .ost file ("OutlookOld.ost"). Then choose the location where you want to save the repaired .pst file.

Start the Repair Process: Click on the "Start" or "Repair" button to initiate the repair process. The tool will attempt to fix the issues in the .ost file and create a new .pst file.

Open the PST File in Outlook: Once the conversion process is complete, open Microsoft Outlook and import the repaired .pst file:

Click on "File" in Outlook.
Choose "Open & Export" > "Open Outlook Data File."
Browse to the location where you saved the repaired .pst file and select it.
After following these steps, your Outlook .ost file should be repaired, and you should be able to access your data in the new .pst file. Remember to back up your original .ost file before attempting any repair process, as there is a possibility of data loss during the repair.