I have a network setup with four subnets.
I have a domain controller running on Inside 1 and I can join servers in that same subnet to the domain with no issues. If I try to add servers from any other subnet to the domain they all fail.
I have rules in place allowing all traffic between subnets, just to rule that out. When attempting a domain add I can see traffic from the source server hitting the DC using Wireshark on the DC so I know that there are no firewall blocking issues.
I suspect my issue is one of incorrect DNS configuration.
Any help on this would be greatly appreciated.