It’s Wednesday morning, I got a shock when my engineers told me that they are not able to connect to Team Foundation Server. As usual, the best remedy of all time: RESTART the computer and server. However, it’s still not working. I still hit the error as mentioned above.

If you were in my situation, no panic :). Go to “IIS” of your TFS server, expand “Application Pools”, notice “Microsoft Team Foundation Server Application Pool”. Is it Stop or in Error mode? If yes, do the following and have your nice day:

Note the identity of your application pool. E.g.: Domain\TFSService. Go to “Active Directory Users and Computers” or “Local Users and Computers”, right-click and select Properties of that user, and check the “Password Never Expires” box. Now, restart your server or start the “error” application pool.

Thanks to Niraj for the guidance (http://nirajrules.spaces.live.com/blog/cns!12C5F7733841CB22!119.entry).