1.6 Applicability Statement
This protocol can be used to perform the following functions:
Obtain the configuration information of the domain to which a computer is joined. The information includes the domain name and domain globally unique identifier (GUID). This protocol can be used to query a DC to determine if it is a primary domain controller (PDC) (or primary domain controller (PDC) role owner) or a read-only domain controller.
Retrieve the upgrade status of a DC. This information is only applicable for the upgrade of a legacy domain controller to a version of Windows that is able to host Active Directory.
Retrieve the domain membership role type for the computer.