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Active Directory Forest Recovery - Remove the global catalog

Use the following procedure to remove the global catalog from a DC.

Restoring a global catalog server from backup could result in the global catalog holding newer data for one of its partial replicas than the corresponding domain that is authoritative for that partial replica. In such a case, the newer data won't be removed from the global catalog and might even replicate to other global catalog servers. As a result, even if you did restore a DC that was a global catalog server, either inadvertently or because that was the solitary backup you trusted, you should remove the global catalog soon after the restore operation is complete. When the global catalog is removed, the computer removes all its partial replicas.

Remove the global catalog using Active Directory Sites and Services

  1. Open Server Manager, select Tools and select Active Directory Sites and Services.
  2. In the console tree, expand the Sites container, and then select the appropriate site that contains the target server.
  3. Expand the Servers container, and then expand the server object for the DC from which you want to remove the global catalog.
  4. Right-click NTDS Settings, and then select Properties.
  5. Clear the Global Catalog check box. Remove GC
  6. Select Apply.

Remove the global catalog using Repadmin

Open an elevated command prompt, type the following command, and press ENTER:

repadmin.exe /options DC_NAME –IS_GC

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