What do you do if the file in TFS is locked by someone else?

Question

Someone left the organisation but before leaving, he locked all the files for an unknown reason.

How do you unlock them all so that the other developers can work?

Answer 1

Have a system administrator reset that users password, log on as that user, unlock all files...

I would think this is the solution to almost all 'someone who is no longer at this organization' questions...