I have a requirement of setting up a group mailbox ,where a couple of users can retrieve voice messages, however the users all have different extensions. They want to be able to retrieve messages for anyone in the group, it they are called on their personal extensions. They also want MWI notification for messages for other group members. I wanted to find out the best way to go about this. Both CUCM and Unity Connection are version 8.6 (setting up GDM is much straight forward on unity express but I am yet to come across any documentation about this on Unity connection).
I know you can set up alternate extensions with call routing but I am not not sure if this would be adequate given there are about 12 users in each group.