Does CME / CUCME 8.5 support Single Number Reachability (SNR) with a SIP Diversion Header, so that the original calling-id can be presented to the phone that SNR sends the call to?
CUCME support SNR with SIP Diversion Header. Mostly the issue is other way around with telco SIP Provider. Please get in touch with provider to ask if they support call forward on SIP trunk with different caller ID other than the ranger they provided and can do authentication based on SIP Diversion Header
That article is for CUCM, not CUCME. I understand the SIP Diversion Header, and how it works. The issue that I am having, is that CUCME v.8.5 is not placing anything in the SIP Diversion Header.