> is no Exchange 2K involved. Does your suggested solution still apply? Ah. I misunderstood your problem. Are these two different Exchange organizations that you are trying to connect or two sites within the same Exchange org? I have attached Exchange servers into the same or different sites in an Exchange org from different domains. The only trick is to use the same username/password for your Exchange service account. Provide more details about the Org names/sites and we'll have a better idea. I've personally have never used the X400 connector, though...that only comes with Enterprise versions of Exchange 5.x.