I have deployed OCS 2007 with Communicator 2007 client. The problems is that we can't create a new group. That option is disabled. I have checked everything OCS 2007 manager I can't find any setting that permits that option. On the search enigens also can't find a thing.
The Create New Group option will be grayed-out in Communicator if you are in any view other than Contact List. You cannot add new 'groups' when in Access Levels, Access Levels Management or Tagged Contacts views.