I renamed a pst file on our server. I didn't make sure that Outlook was closed. I went to rename the pst and it corrupted the file. How can I get this to read as a .pst file again.
Golden rule of all file based computing - Always always keep a backup copy of important data files, do it frequently.
I don't know exactly what corruption has occurred so I can't help with the specifics of your issue.
If the file is now correctly named and Outlook can't read it there may not be a practical solution, the file will need to be recreated.
If you are running windows vista or higher, you may have the option to restore an earlier version of the file. There is a service in windows called volume shadow copy and it makes backups of files. Hopefully you have an older copy you can restore to.