This process has changed a little with current Jabber builds. My Jabber Version: 12.9.0.53429 Build 303429File Name: jabber-config-defaults.xmlPath (for me): C:\Program Files (x86)\Cisco Systems\Cisco Jabber I had to change the permissions on the 'Ci...

Ours failed at this as well. We had to upgrade the vmtools prior to doing anything. This allowed us to select CentOS 7. Everything after that went smoothly.

Thanks, Jamie! You've helped my coworkers and me so much over the years. 

Can you please share a UCCX editor screenshot?