Caller ID and Contact Lists assigned to a Group

When having the main line forward to a group that rings out to certain users it should be able to also display the caller ID. It is extremely disappointing that this doesn't already exist as the phone number ID is displayed in the same situation making it difficult to understand why the caller ID name would not be displayed. In fact the inflexibility of programing groups is extremely frustrating. This shouldnt have to be developed, this should already by a feature.