Hi there, There's an issue with operating a Windows 2003 AD domain across two subnets. The are two offices of the same company within one town. Recently the second one got wired up with a permanent cable link and is connected to the main office via VLAN. Main Office has LAN 192.168.10.0/24 and Branch office has LAN 192.168.12.0/24, which has to be joined to the main office's domain. The plan is to raise a DC at the Branch and tweak the replication intervals to go over the VLAN link, bandwidth permits that okay. Now, the link is working fine. The firewall of the Main Office LAN, which is ISA 2004, has been setup to ROUTE the traffic between the subnets instead of NAT and also all-permitting rule in both directions was added. When we try to join the to-be-DC server at the Branch error comes up: The remote procedure call failed... The DNS for the joining server has been setup to be the DC at Main Office, so that's fine. It's connecting to it okay and in fact can open fine any network shares that we have in the 192.168.10.0 network (obviously the username/password prompt comes up aksing for domain credentials). NSLOOKUP resolves all hosts fine. I am puzzled. Any ideas what else to try for resolution? Thank you. Alex A