I'd be interested too about copying / backing up an open pst. One of my customers has tons of those things. Backup Exec sees them as corrupted files.

At one point, I was going down the road of trying to determine if any pst files were open, and to either close the app or disconnect the shared directory. Now what did I do with that code?... and what was the result? (Don't mind me, just having one of my many senior moments. )