I've added MobileConnect to a customer who loves it apart from the following strange one:-
DDI: 0207 422 1234
MOB: 0777 777 5678
So we have configured the Remote Destination "9 0777 777 5678" and it works fine.
But when the customer calls their DDI from the Mobile, CUCM seems to match the inbound CLI as part of that extension and replaces it with the user's DN.
Unfortunately we add "9" to all inbound CLI so we end up with a CLI of "91234" and because it associates the two it immediately flags the desk phone as busy and puts the call into Unity.
As helpful as CUCM is being, I want to turn off this functionality. If someone is sitting at the customer's desk they at least want the option of phoning them!
Gold stars to anyone who can crack it!