Symptoms
When signing in to a desktop on the TTU domain you get the following error:
The security database on the server does not have a computer account for this workstation trust relationship.
Cause
Cause #1
The computer does not have an active connection to the TTUnet network.
Cause #2
The computer into which you are attempting to sign in was deleted from the TTU domain in Active Directory.
Resolution
Resolution #1
IMPORTANT: Try this resolution first. If this does not work, then try Resolution #2.
Verify that the computer is connected to TTUnet via a wired, wireless, or VPN connection.
Resolution #2
2) Add the computer back to the TTU domain.
Outcome
You are able to sign in to the computer again.