The Inter-site Topology Generator (ISTG) and the KCC play an important role in Active Directory replication.
Managing the Inter-site Topology Generation and Knowledge Consistency Checker
Getting ready
To manage the ISTG and the KCC, you'll need to be signed in with an account that is a member of the Enterprise Admins group.
How to do it...
Moving the ISTG to another domain controller and disabling the KCC can be performed using Active Directory Sites and Services and/or the Active Directory module for Windows PowerShell.