Join an Active Directory Domain You must be a local user with administrative privileges to join an array to an Active Directory domain. Join the Active Directory domain. userauth --join domain_name --domain_user domain [--ou ou_name] [--computer_name computer_name] [--netbios_name netbios_name] Enter the password at the prompt. (Optional) To verify that the array was added to the Active Directory domain, run the --list command.