What happens when a FSMO Role Fails
What happens when a FSMO Role Fails
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Infrastructure master failure
A failure of the infrastructure master will be noticeable to administrators but not to users. Because the master is responsible for updating the names of group members from other domains, it can appear as if group membership is incorrect although, as mentioned earlier in this lesson, membership is not actually affected. You can seize the infrastructure master role to another domain controller and then transfer it back to the previous role holder when that system comes online.
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Schema master failure
The schema master role is necessary only when schema modifications are being made, either directly by an administrator or by installing an Active Directory integrated application that changes the schema. At other times, the role is not necessary. It can remain offline indefinitely until schema changes are necessary. Seizing this role to another domain controller is a significant action. After the schema master role has been seized, the domain controller that had been performing the role cannot be brought back online.
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RID master failure
A failed RID master will eventually prevent domain controllers from creating new SIDs and, therefore, will prevent you from creating new accounts for users, groups, or computers. However, domain controllers receive a sizable pool of RIDs from the RID master, so unless you are generating numerous new accounts, you can often go for some time without the RID master online while it is being repaired. Seizing this role to another domain controller is a significant action. After the RID master role has been seized, the domain controller that had been performing the role cannot be brought back online.
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PDC Emulator failure
The PDC Emulator is the operations master that will have the most immediate impact on normal operations and on users if it becomes unavailable. Fortunately, the PDC Emulator role can be seized to another domain controller and then transferred back to the original role holder when the system comes back online.
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Domain naming master failure
The domain naming master role is necessary only when you add a domain to the forest or remove a domain from a forest. Until such changes are required to your domain infrastructure, the domain naming master role can remain offline for an indefinite period of time. Seizing this role to another domain controller is a significant action. After the domain naming master role has been seized, the domain controller that had been performing the role cannot be brought back online You can also get the details of Failure Modes in Active Directory(FSMO)
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