I have three sites. One of my sites has some sort of corruption that throws DNS errors when I try to replicate. The bad site is a single server Windows Server 2016 GC and I make backup image copies of the server every hour. This corrupted server is NOT the PDC, Domain Naming Master, Schema Master, etc. I believe I can go back to when replication stopped and restore the server. I haven't tried dcpromo because I am not sure if that would work. My question is whether I should try dcpromo since it's a single server off site connected via VPN, or should I restore the server from backup? Or maybe there is another suggestion?