Hi, I have followed all the instructions in the official manual for setting up unified messaging on Exchange 2007/2010 with 3CX. However, when calling 999 for voicemail 3CX reports the following logs:# 20:00:18.826 [CM503003]: Call(37): Call to sip:MNU@192.168.0.221:5060 has failed; Cause: 403 Forbidden; from IP:192.168.0.221:5065 192.168.0.221 is my exchange server The exchange server reports the following error: The unified messaging server rejected a call with incoming call with the ID ###ID###. Reason: The unified messaging server has recevied an incoming call with a SIP URI "sip:MNU@192.168.0.221:5065;transport=tcp". That's not valid for dial plan "3CX". Any help to get this working would be very appreciated. The error seems to be saying that the dial plan is not allowing it but I have checked everything.