Hi voip7372,   This is possible, I implemented it this week.   Please follow this doc: https://cmslab.ciscolive.com/pod0/ms/s4b-dh   I personally created a route pattern so telepresence or jabber endpoint can dial *+S4B Conference ID (Example, *8899)...

Hi spencermoore, please tell me how you did that? I'm having the same problem and the TAC has not found the problem yet. How did you skip the DNS check? thank you