The domain controller stores three pieces of information about accounts, passwords, and computers belonging to the domain  When the computer is connected to the network, the domain controller must first identify whether the computer belongs to the domain, whether the login account used by the user exists, and whether the password is correct  If all three messages are correct, login is allowed; if one of the above information is incorrect, the domain controller will refuse the user to log in from this computer
Xiao Zhang's login account is correct, but the domain controller refuses to log in to Xiao Zhang's computer
The password entered by Xiao Zhang is wrong.