Hi All,
In efforts to troubleshoot this i pointed the outbound call rule in CMS to Expressway-C instead of CUCM simply for the ease of looking at the expressway search history rather than pulling CUCM traces and how changing the setting in the "local from domain" on CMS does indeed change the domain portion of the caller ID to be whatever you want it to be.
However when the call hits CUCM, CUCM will replace the domain with it's own IP address unless the destination device (jabber phone in this case) has a sip profile with the "Use Fully Qualified Domain Name in SIP Requests" enabled (checked)
Some other things i noticed that are worth pointing out relating to dial back from jabber call history
When you are logged into the meeting app and you use the "meet" button to place a call to CUCM jabber the call appears on the jabber endpoint with the caller ID in the format "username@cms.domain" which is the same format you use to log into the CMS app, this is the CMS user ID
When you place the same call to CUCM but from inside a space, the format appears as "username.space@cms.domain" this is CMS space ID
You can achieve dial-back from jabber on CUCM for both formats simply by making sure that the inbound call for the cms.domain on CMS targets both "users" and "spaces" and by making sure you have a "cms.domain" sip route pattern on CUCM pointing at your CMS trunks
Hope this is of use to somebody.
