If your Outlook PST file is corrupted, you can repair it using either the built-in tool or a professional software.

Method 1: Using Microsoft’s Inbox Repair Tool (ScanPST.exe)

Close Microsoft Outlook.

Locate ScanPST.exe on your computer (usually in C:\Program Files (x86)\Microsoft Office\root\OfficeXX, replace XX with your Outlook version).

Open ScanPST.exe and browse to select the corrupted PST file.

Click Start to scan for errors.

After the scan, click Repair to fix the PST file.

Open Outlook and check if your emails and other data are restored.

Method 2: Using a Professional PST Repair Tool
If ScanPST cannot fix the file or it’s severely damaged, use a reliable tool like Advik PST Repair Tool:

Install and launch Advik PST Repair Tool.

Add the corrupted PST file to the software.

Select the recovery mode.

Preview recovered emails, contacts, calendars, and attachments.

https://www.adviksoft.com/pst/recovery.html