The RID MASTER is responsible for processing RID POOL REQUESTS from all domain controllersin a PARTICULAR domain. When a DC creates a security principal object such as a user orgroup, it ATTACHES a unique Security ID (SID) to the object. This SID consists of a domain SID(the same for all SIDs created in a domain), and a relative ID (RID) that is unique for eachsecurity principal SID created in a domain. Each DC in a domain is allocated a pool of RIDsthat it is allowed to assign to the security principals it creates. When a DC’s allocated RIDpool falls below a threshold, that DC issues a request for additional RIDs to the domain’sRID master. The domain RID master responds to the request by retrieving RIDs from thedomain’s unallocated RID pool and assigns them to the pool of the requesting DC. At any one time, there can be only one domain controller acting as the RID master in the domain.PDC Emulator.

The RID master is responsible for processing RID pool requests from all domain controllersin a particular domain. When a DC creates a security principal object such as a user orgroup, it attaches a unique Security ID (SID) to the object. This SID consists of a domain SID(the same for all SIDs created in a domain), and a relative ID (RID) that is unique for eachsecurity principal SID created in a domain. Each DC in a domain is allocated a pool of RIDsthat it is allowed to assign to the security principals it creates. When a DC’s allocated RIDpool falls below a threshold, that DC issues a request for additional RIDs to the domain’sRID master. The domain RID master responds to the request by retrieving RIDs from thedomain’s unallocated RID pool and assigns them to the pool of the requesting DC. At any one time, there can be only one domain controller acting as the RID master in the domain.PDC Emulator.