II didn't have a SIP trunk, I configured it through th wizard on CUCM , then creat the port on unity, then I got it register with unity primary ip address , when I shutdown the unity it didn't go to secondary?

I create one group , I didn't see the option to choose CUC for the ports?

For a unique Port Group, you would see an option to create ports in the top right corner under "Related Links" --> "Add Ports".

It is recommended that you create unique port groups of each node in SCCP integration.

>>In case of Cluster, create two Port Groups in Unity followed by Ports in each port group.

>> Create the ports in CUCM and mapping would be done on the basis of "Device Name Prefix" of Port Group in Unity Connection.

For Unity Publisher : Use Device Name Prefix of Port group of the Publisher to map Ports in CUCM to unity PUB.

For Unity Subscriber: Use Device Name Prefix of Port group of the Subscriber to map Ports in CUCM to unity SUB.