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FSMO roles

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Okay, not strictly Exchange but interesting none the less.

 FSMO roles (Flexible Single Maaster Operations), there are 5, three of which are domain wide and 2 are forest wide... Here they are:

Schema Operations Master. There is a single schema operations master role for the entire enterprise. This role allows the operations master server to accept schema updates. There are other restrictions on schema updates.

Relative ID Master. There is one relative ID master per domain. Each domain controller in a domain has the ability to create security principals. Each security principal is assigned a relative ID. Each domain controller is allocated a small set of relative IDs out of a domain-wide relative ID pool. The relative ID master role allows the domain controller to allocate new subpools out of the domain-wide relative ID pool.

Domain-Naming Master. There is a single domain-naming master role for the entire enterprise. The domain-naming master role allows the owner to define new cross-reference objects representing domains in the Partitions container.

PDC Operations Master. There is one primary domain controller (PDC) operations master role per domain. The owner of the PDC operations master role identifies which domain controller in a domain performs Windows NT 4.0 PDC activities in support of Windows NT 4.0 backup domain controllers and clients using earlier versions of Windows.

Infrastructure Master. There is one infrastructure master role per domain. The owner of this role ensures the referential integrity of objects with attributes that contain distinguished names of other objects that might exist in other domains. Because Active Directory allows objects to be moved or renamed, the infrastructure master periodically checks for object modifications and maintains the referential integrity of these objects

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