I have 2 Windows 2012 DCs (DC1 and DC2).
From DC2 replication works while from DC1 I keep getting the error "replication error rpc server is unavailable. I'm attempting to do this from Active Directory Sites and Services.
DNS functions correctly and am able to ping with both hostname and IP. All was functioning correctly until when yesterday we switched on an old DC3 which has not been utilized for a year or 2. DC3 has been powered off.
Any suggestions on how I could solve the replication issue between DC1 and 2 please?