188.8.131.52 Well-Known Domain-Relative Security Principals
In each domain NC, there are certain well-known security principals. These well-known security principals are given default privileges in the domain. For more information, see section 5 and also see [MS-SAMR] section 184.108.40.206.
Each of these objects has the following attributes:
The objects of class user have the following attribute:
primaryGroupID: This value is a RID, which refers to another well-known domain relative security principal.