How to Add or Remove the Global Catalog?

You can use the Active Directory Sites and Services snap-in to add or remove the global catalog.

1. Open Active Directory Sites and Services. (Click Start, click Administrative Tools, and then click Active Directory Sites and Services.
2. In the console tree, click the server object to which you want to add the global catalog or from which you want to remove the global catalog. (Active Directory Sites and Services\Sites\SiteName\Servers)
3. In the details pane, right-click NTDS Settings of the selected server object, and then click Properties.
4. Select the Global Catalog check box to add the global catalog, or clear the check box to remove the global catalog.