Hi to repair PST files there are various methods like you can use the Microsoft’s inbuilt outlook repair tool scanpst.exe, it can handle the OST/PST files up to 2 GB and can repair minor corruptions in your Outlook Data File. Another way is you can use Microsoft’s SARA Tool which helps to troubleshoot and diagnose their issues. If these inbuilt solutions can’t help there are 3rd party tools which specially designed to repair and recover the Outlook Data Files. One recommended tool that you can try is Stellar Repair for Outlook, which shows the preview of mailboxes after scanning the OST/PST files in demo version, if you can see all your mailboxes in the preview pane then you can purchase the license of the software to save your recovered file. For more details check here: https://windowsreport.com/stellar-repair-for-outlook/