SeMachineAccountPrivilege gives service privilege to add workstations to domain.
Allows the user to add a computer to a specific domain. For the privilege to take effect, it must be assigned to the user as part of the Default Domain Controllers Policy for the domain. A user who has this privilege can add up to 10 workstations to the domain.
Default setting: Not assigned.
Users can also join a computer to a domain if they have Create Computer Objects permission for an organizational unit or for the Computers container in Active Directory. Users who have this permission can add an unlimited number of computers to the domain regardless of whether they have been assigned the “Add workstations to a domain” privilege.