I just setup a domain server 2008 R2 with two NICS. Each NIC is on it's own subnet and each has it's own internet connection. I need to have one Dept on one network and the other on the second. They both have access to the Active Directory on my Domain Server.
Otherwise, they are mutually exclusive networks using unmanaged switches.
I also have an Exchange 2010 SP2 server 2008 R2 (on the same LAN) that is configured with Subnet A. It also has two NICs one configured with each subnet. The problem I am having is that I can plug into Subnet A and get Outlook 2010 connected to Exchange. But I cannot get outlook 2010 to connect to Exchange when I plug into Subnet B. I can ping the Exchange server on Subnet B and nslookup shows both subnet IP's. There must be something in Exchange that will configure it to listen on both subnets. I would assume I would also need the second subnet to have access to the internet in order for all the users on subnet B to use email. First I need to get it working internally.