- nslookup
- set type=srv
- _gc._tcp.domain.local
- nltest /dsgetdc:alabama.usa /gc
- netdom query dc
- Open Active Directory Sites and Services.
- In the console tree, expand the Sites container, expand the site of the domain controller you want to check, expand the Servers container, and then expand the Server object.
- Right-click the NTDS Settings object, and then click Properties.
- On the General tab, if the Global Catalog box is selected, the domain controller is designated as a global catalog server.
