Ok, We have a 2 companies the we do business with, both are in our building
and both are using GW and both are actual in separate DMZs on our firewall.
They wanted to have separate systems just incase any of us move or what ever
might happen.

I read on an earlier thread that there is no way to connect domains in such
a way as to IM between us, This is a bit on the overboard side of secure IM.