Celtic wrote:

Any pst that I have copied to the server without the pfbackup opens
fine, its just that none of the backups from any of the 12 users can
be opened.

All does, as base, if a copy of the PST. It doesn't process it in any way,
as far as I can tell, so I can't think of anything that would cause what you
see. Before clicking "Save backup", click Options and give the target a new
name. Then click "Save backup" and see if the PST created behaves.
--
Brian Tillman [MVP-Outlook]