On my desktop. I can't backup my Outlook.pst file while Outlook is open. If I close it. It works fine.
Backing up open files has the following limitations: It works
- only on Windows XP, Windows 2003 Server, Windows Vista, Windows 7 or Windows 2008
- only for users with administrator access rights to copy open files
- only on local hard drives
- only on NTFS formatted partitions
- only if the VSS (Volume Shadow Service) is running and it is properly configured