For some reason this same setup got me once before and so now I’ll record it here so I never have to search for the answer again. A windows 2003 machine at Colo, multihomed with a front and a back network interface and the Windows domain on the back net. You can login for administration via terminal services to the local machine, but not to the domain – getting event id 1219 – the network address is invalid. This happens when the binding order for the network adapters is such that the front net is first. Move the back net first and everything is OK. To get there – network properties – Advanced menu | Advanced Settings. Don’t know why it is buried in there, but that is the solution.