This is Microsoft’s link for configuring the XMPP Gateway (which works with Jabber) on OCS 2007 R2.
The instructions aren’t that great for me, because Microsoft did it thinking I would be configuring the XMPP gateway to communicate with a jabber server on my own domain behind my firewall. I would actually like to simply have my XMPP gateway server federate with other jabber servers on the internet. In my environment, I have OCS 2007 R2 up and running on Windows Server 2008, along with the XMPP gateway which is federating perfectly with Google Talk. The Jabber console configurations in the article are much different from the OpenFire Admin Console, but I did the best I could on the configurations. I configured server to server configurations to connect to the public DNS name of my XMPP gateway. I got a little puzzled with the gateway plugin. Is it simple/sip or xmpp gateway? And do I configure an extra “A” record in DNS for xmpp.OpenFire.company.com to point to the same IP as OpenFire.company.com? I configured my SRV records the way Microsoft said to do it. When I connect from either side, I just get timeouts. I dont even get any events in the event viewer. Has anyone successfully gotten OpenFire to federate with OCS? Any help is appreciated. Thanks.