I've been installating a Windows 2008 Server to provide a domain on a network in a school. The school has a satellite broadband connection and there is a gateway machine which provides DNS and DHCP services for the network.
I have configured my 2K8 DNS server with a static IP (provided by the company who are resposbile for the internet gatway) and it correctly forwards unresolved requests to the existing DNS server on the network.
I can join WinXP machines to the new domain but I have to manually set the DNS server on the XP boxes, as they get their IP address from the existing DHCP server.
I found a Group Policy to set DNS servers, but it doesn't seem to work (I know other GP stuff is working as I have a WSUS server working ok). Any ideas?