We have a relatively small domain - 7 servers total with about 200 users... All of our servers are running MS Windows Server 2003... for lack of a better term our PDC (which I know doesn't exist anymore) is called MSDSB04. It handles DNS as well as Active Directory and DHCP on the local LAN segment.
I have added two other Active Directory servers over the last year or so - the intent being that if something happened to MSDSB04 they would handle DNS and authentication requests seamlessly without any interruption of service to the LAN users... this has not worked... When MSDSB04 goes offline - it kills the LAN.
What do I need to do to get these other servers to pick up the slack on demand?