I have a weird issue and i faced it in my LAB enviroment also i faced this issue in real scenario i'm here to ask if someone did have this issue before or not
i have all my servers ( Windows 2012 r2, CUCM, CUC, IMP ) in network 10.0.100.0/24
When i connect clients in the same network as server Jabber logs fine without any issues.
When i take the same clients to a different network but same parameters such as DNS only change is the network to seperate the clients from servers Jabber faces issues communication error.
Note. Everything is same DNS only change in the network of the hosts ( IP reachibility is there )
Thanks Everyone for helping and supporting
Problems solved it wasn't CUCM or IMP problem it was DNS problem since it was a newly server created
You need to trust any new networks in Active sites and Services
also you need to create reverse zone for all different networks that will join jabber