To repair a PST file manually, you can use the built-in Microsoft Outlook Inbox Repair Tool (scanpst.exe). First, close Outlook and locate the scanpst.exe file on your computer. Then, open it, browse to the location of the corrupted PST file, and click "Start" to begin the repair process. If the tool finds errors, it will prompt you to fix them. However, this method may not work for severely corrupted files or files with complex issues.
For a more comprehensive solution, the Shoviv Outlook PST Repair tool is a professional tool designed to repair and recover corrupted PST files. It quickly recovers emails, contacts, calendars, and other mailbox data, ensuring no data loss. It also allows you to convert the repaired PST file into multiple formats like PST, EML, MSG, and Office 365. The tool comes with a free demo version, which lets users repair and preview up to 50 items per folder before purchasing the full version.
Read more: https://www.shoviv.com/blog/how-to-repair-outlook-pst-2019-2016-2013-and-2010-data-files/