I am a bit unclear if presence is supported between 2 different CUPS/CUCM clusters. They both exist within the same WAN, but have just evolved as two seperate clusters. There is an ICT between the CUCM systems. The CUPS systems aren't actually installed as yet.
I can see various documents discussing intercluster federation such as:
Although it mainly talks about OCS federation but does mention other CUPS clusters.
I don't think we have a need for TLS in this scenario, so would I still need ASA involvement?
Or there is this link:
Which seems more appropriate. Although the document seems to state the different clusters should be in the same "domain". I guess its the interpretation of that which is confusing me.
In my case they are in the same network, but different CUCM clusters and different AD domains.
So which model am I looking at?
And if possible does anyone know specifically which presence features are supported/not supported in my scenario between the CUPS clusters?