[cvsnt] How to perform Undo Edit?

[ncal]

Hi,
   One of our ex-team members had put all files in an edit mode, and left
the company. Since then, when any of us edits the files, we get a message
that he has them checkedout. His user id has been removed from the domain by
IT.
   Is there a way that I can undo edits - is there an admin file that I need
to modify?

Thanks