I had 2 DC's in my domain, each DC also ran a DHCP server. We split the scope x.x.x.50-100 on DCA and x.x.x.100-200 on DCB. We did this for 5 different VLANs
When clients connected they would go to DCA first then if all DHCP Ip's were used for their VLAN they would go to DCB.
Recently we've replaced DCA with a new windows 2012 R2 server as our DC. We migrated DHCP from DCA to our new Win 12 DC. Problem is that clients are refusing to go to the new DC to get DCHP. They keep going to DCB. I've confirmed that the migrated scope is activated and authorized