- Verify the computer is properly joining the domain.
 - Ensure that the computer’s name is available on the network and has not been replaced by a duplicate name.
 - Check the DNS settings and DHCP configurations for the computer.
 - Make sure that the computer and domain has the same time and time zone.
 - Verify that the domain controller is available and accessible.
 - Ensure that the DHCP server authorization settings have been completed.
 
