Federating Microsoft Office Communications Server with XMPP

If you are trying to federate your OCS or Lync service with an XMPP domain using Microsoft Office Communications Server 2007 R2 XMPP Gateway, you will need to do the following

1. Create an SRV record on your DNS server

_xmpp-server._tcp.your-xmpp-domain-name SRV 0 0 5269 xmpp-gateway-hostname

You can test if your service record is correct by using nslookup command. The following is an example of a lookup for Google’s XMPP service.

system:~ # nslookup > set type=srv > _xmpp-server._tcp.gmail.com Server: 165.21.83.88 Address: 165.21.83.88#53 Non-authoritative answer: _xmpp-server._tcp.gmail.com service = 5 0 5269 xmpp-server.l.google.com.

2.  Install the latest patch for the XMPP gateway

3. Configure the XMPP gateway security settings to TCP dialback.

4. Set your XMPP server security settings to accept TCP dialback. You may need to disable TLS as well to force it to use TCP dialback.