The Netlogon Remote Protocol is a remote procedure call (RPC) interface that is used for user and machine authentication on domain-based networks.
The Netlogon Remote Protocol in Windows is used to maintain domain relationships from the members of a domain to the domain controller (DC), among DCs for a domain, and between DCs across domains. This RPC interface is used to discover and manage these relationships.
Sections 1.5, 1.8, 1.9, 2, and 3 of this specification are normative. All other sections and examples in this specification are informative.