To configure a domain controller as a global catalog server

1. Open Active Directory Sites and Services.
   
2. In the console tree, right-click NTDS Settings.
   
   Where?
   
   
   • Active Directory Sites and Services/Sites/YourApplicableSite/Servers/YourApplicableServer/NTDS Settings
     
3. Click Properties.
   
4. On the General page, select the global catalog check box.