Seizing FSMO roles

FSMO role-seizing is a last-resort action and is only used in scenarios in which the original domain controller isn't available, due to a hardware failure or accidental deletion. The available data on the other domain controllers might be incomplete or out of date. Unlike transferring, FSMO role-seizing can't be performed using Active Directory MMC Snap-ins. FSMO role-seizing can be completed only using PowerShell or the ntdsutil command-line tool.

The PowerShell command for FSMO role-seizing is the same as for transferring, but we need to include the -Force switch:

Move-ADDirectoryServerOperationMasterRole -Identity TargetDCName -OperationMasterRole FSMORoleName -Force