Hi..That is the whole issue,,, The proxy 1 and proxy2 do not know each other. How can I configure openser so that it recognizes proxy1 as another proxy and sends/receives invites? I do not want any of the proxies acting as out bound proxy. Both should be primary proxies for their respective domains and yet they should be able to recognize the other proxy and forward the requests to it.In other words, what I am asking how do the proxies talk to each other?