In doing a Lync 2013 deployment, we have merged the ancient OCS2007r2 standard server into our Lync Topology.
My problem is that we are unable to chat across pools in either direction
The individuals can be searched for but information on their status and the ability to chat does not work.
Our OCS 2007r2 runs a single standard edition server that runs chat and the web interface, no other major features are enabled nor do we have an edge pool or anything special configured (don't you love inheriting stuff?)
Lync 2013 has been stood up with an internal enterprise pool running chat, monitoring and archiving.
What are some of the most obvious things that I should be looking for in solving the communications between the two pools?