Flexible Single Master Operations (FSMO)

Flexible Single Master Operations (FSMO)
Certain roles / jobs that can't have multiple writeable copies (conflicts)
Every D.C has a read only copy of all roles, for recovery
Seizing converts a read only copy of one of the above roles to a writeable copy
5 FSMOs
Forest level (these will generally live in the root)
Domain Naming Master - Config. Partition of AD - Trust Relationships, Unique Domain Names
Schema Master - Master copy of schema database (must be registered)
Domain Level (read only copy lives on every D.C.) - can be recovered via transfer and seizing
RID Master - Ensures unique identifiers for every object in domain
Infrastructure master - allocates groups/resources across different domains
PDC Emulator Master - Passwords, time, GPO replication across domains