I am currently facing an issue with my old Outlook PST file. It seems to be in an older format and is now causing compatibility problems with the newer version of Outlook I am using. I have read that upgrading the PST file can help, but I am not sure about the correct and safe method to do this without risking data loss. Can anyone guide me on how to successfully upgrade a PST file to a newer version of Outlook? Are there any built-in methods or reliable tools you’d recommend for this process?