I have a SBS2003 server installed at our headquarters location. Through VPN routers I have multiple remote offices connected back into the headquarters network. All PC's at all locations have the IP address of the SBS at headquearters as there only DNS entry (per SBS setup instructions). Everything is fine when all network/broadband connections are working, however we occasionally lose connectivity either on the headquarters end or remote end. When this happens, all PC's at the remote locations cannot browse the Internet, nor resolve other IP's on their own internal LAN's since they can't access DNS on the SBS at headquarters. I have a 2003 server at each remote location running Active directory as well. What configuration can I do on the remote 2003 servers to have them act as secondary DNS servers? Is this even possible? I would like to have them sync with the main SBS, and all machines use it as primary, but have the IP of their local 2003 server as the secondary DNS server. I'm thinking this shouldn't be a problem, but I want to be certain I configure it correctly.
Anyone have some step by steps?