I have SITE A with a DC named DC-A. Users exist on the same subnet as DC-A, and we'll call this subnet Subnet-A.
DC-A has stopped working correctly, so I want users on Subnet-A to start using one of the other DC on one of the other sites. Can I just assign Subnet-A to use a different site? How will clients in Subnet-A be told to use a different DC if the current DC they point to is not working or replicating?