Big display of ignorance here. :-)

I currently have a BMgr server to server VPN. I'm going to be
replacing it with a private line with a cisco router at each end. I
will still have one BMgr server acting as my firewall and proxy to the
internet. I will have someone configuring the routers for me.

internet --- bmgr firewall --- office 1--- private line --- office 2

I'm wondering if I need to do anything at the servers/PCs so they will
know about the other side of the private line? Or will the routers
handle this themselves?

Ken Etter does a server good!