Phantom Session

I recently ran into a problem trying to update an Exchange TDP's password. When we would try to update the password on the TSM server we were presented with an error stating that the password could not be updated due to the client being in session. Strange thing was that it was NOT in session. We waited thinking maybe it was a residual transaction taking place in the log or DB for the TDP, but after some time we realized it was not going to clear up. It actually took a reboot of the TSM server to allow the resetting of the TDP's password. Anyone seen this on 5.4.1? If so let me know what if anything you did to clear it up.