Intercluster Presence Communication, NO TRUSTS

[tdrew]

Is there any way to setup Prsence communication in a multi-forest and multi-cluster environment without using trusts between domains?

I need to be able to provide presence status, searchable directory, etc...

 

[whykap]

This is called a inter-domain federated deployment and it requires ASA's on both ends at the DMZ to terminate the connections. It also requires two DNS domains to be configured.
The CUCM SRND which is available on cco details all this. The how to would be in the installation guide.