I am helping a friend out sort out through his computer server and desktop computers. His company has Windows Server 2012 Essentials.
I added a user and added him to the domain user's group. I basically copied an existing user and his group membership to the new user I created. When I tried to logon to his about using the following format "Domain name\user name. I received the following error
Getting error the signin method you're trying to use isn't allowed.
When I go back and login as the user he was login in as domain name\existinguser he can log in just fine.
I tried logging him on another computer, and get the same message. Seems as is the computer name is somehow tied to a particular domain user.
How can I fix this problem?