We have installed server 2008 r2 and made it a Domain Controller. There are 15 client machines that are connected to the domain. In the past month all domain user logons where working fine. Unfortunately since yesterday we are not able to logon to the domain with any user except the administrator logon. when we trying to logon with any user on the domain it says:
"You cannot log on because the logon method you are using is not allowed on this computer"