Hello -
When you make a change in Unity UTIM, such as the CallManager IP addresses, it will ask you to restart Unity after pressing the Save button. Does not require a reboot. You select the Integration name, not Properties. Highlight the IP address and select Modify. When you make the change in UTIM, I would test the connection using the Verify Servers button to make sure Unity can contact the servers. By restarting the Unity services, you should see the voice ports reconnect to CallManager. This is the only area you need to change.
Ginger