I have a Unity Express running on a Call Manager Express that the MWI is not working correctly. The CME had it's IP changed, not the Unity, but calls are still pushed to Unity and users are getting the voicemails. Just MWI is not working correctly. What can I look for within the CME or UE to check why?
There are some good tips in this guide;
**Cisco Unity Express points to the correct Cisco CallManager Express server IP address. The show ccn subsystem sip command shows this.
Troubleshooting Unity Express Message Waiting Indication (MWI) Problems
Hope this helps!