Seize A Role – Ntdsutil.exe

  1. CMD prompt, type ntdsutil and press Enter.
  2. At the ntdsutil prompt, type roles and press Enter.
  3. At the fsmo maintenance prompt, type connections and press Enter.
  4. At the server connections prompt, type connect to server DomainController FQDN and press Enter. For example, DCname.Microsoft.com. Ntdsutil responds that it has connected to the server.
  5. At the server connections prompt, type quit and press Enter.
  6. At the fsmo maintenance prompt, type seize role and press Enter. Role is one of the following:
    1. Schema master
    2. Domain naming master
    3. RID master
    4. PDC
    5. Infrastructure master
  7. At the fsmo maintenance prompt, type quit and press Enter.
  8. At the ntdsutil prompt, type quit and press Enter.

*The PDC emulator and infrastructure master are the only operations master roles that can be transferred back to the original master after having been seized.

*Do not return a seized schema, domain naming, or RID master to service. After seizing the schema, domain naming, or RID roles, you must completely decommission the original domain controller.  Keep the original role holder physically disconnected from the network, and you must remove ADDS by using Dcpromo /forecremoval command.  Also perform clean the metadata for the DC using the Ntdsutil.

**BETTER TO REBUILD!

Source: Configuring Windows Server 2008 Active Directory