You have an issue with the SIP Proxy. Presence is taken care through SIP messages.
I would restart the Presence Engine, then restart the SIP Proxy. Once restarted, log out of the CUPC Client and log back in.
Well, not sure then because the only way messages are sent to each other is through SIP. Can you check on your Troubleshooter on the CUPS server to see if there are any errors?
If you have a subscriber in the mix, shut it down and concentrate on one server to fix the problem.
I would completely reboot the Presence server to clear it out. From the Console login
utils systems restart
Takes about 5 minutes or so for the reboot take.
Log off your clients for about 60 seconds or, then log back in.
You could also have a DNS problem. Try changing all your references to the cups server to IP address. (in the server configs)
Appreciate it, but it did not work.
I am sniffing the Presence server port and noticed all the CUPC clients reporting "Destination port unreachable". Not sure why, its a simple routed network with 4 differnt VLAN. Client PC has no firewall and no network firewall either between the VLAN.
Please note, i am having issues with IM feature alone, rest works with no issues.
this fixed our problem.
Your proxy domain name is in upper case, you could be running in to this bug.
CSCsl63971:case-sensitivity on proxy domain causes CUPC problems
please change the proxy domain to lower case and restart the proxy services, directions are as follows
web page -> system -> service parameters -> Cisco UP SIP Proxy -> Proxy Domain.
Then go to Serviceability web page -> Tools -> Control Center - Feature Services, restart the Cisco UP SIP Proxy service