Post CUPS 8.5(3) upgrade getting CUPC "did not receive your message because it could not be delivered".

[Jason Aarons]

I upgraded CUPS from 7.0(2) to 8.5(3) and now CUPC 7.1(1a) clients can’t chat each other, they now get the following message.

Rose, Bob did not receive your message because it could not be delivered. (3:14 PM)

Wireshark shows response back from CUPS server ip as 408 Request Timeout.

Only the server was upgraded, not the clients.

[Jonathan Schulenberg]

All of the SIP client messages on CUPS 8+ are routed through the XMPP services. Are they activated/started?

[Jason Aarons]

After several hours with Cisco TAC we found CSCsl63971  (case-sensitivity on proxy domain causes CUPC problems) and were able to resolve the issue so users can continue to use CUPC 7.1(1)