Is Office Communicator required for Communicator Mobile (2007 release) users?
No, but we strongly recommend that you use Office Communicator 2007 in conjunction with Communicator Mobile (2007 release). Office Communicator 2007 is useful for certain features, such as creating and managing groups and gathering and providing your Microsoft Exchange Server calendar information. For users who run desktop and mobile device clients simultaneously, Communicator is required so that both the desktop and mobile device client will receive a new instant messaging (IM) invitation.
