Cisco Jabber Certificates

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-presence/116917-technote-certificate-00.html 

https://supportforums.cisco.com/t5/jabber-clients/cucm-and-imp-ip-address-to-fqdn/td-p/2588634

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/11_6/cjab_b_planning-guide-cisco-jabber-116/cjab_b_planning-guide-cisco-jabber-116_chapter_0111.html

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/11_6/cjab_b_on-premises-deployment-ciscojabber-116/cjab_b_on-premises-deployment-ciscojabber-116_chapter_01100.html

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/211393-Change-CUCM-Server-Definition-from-IP-Ad.html