Looks like they fixed in jabber v12.9, documentation says you need CCE 12.5 but we got it working in 11.6 https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/12_9/cjab_b_release-notes-cisco-jabber-129/cjab_b_release-notes-cisco-jabber-129_chap...