One of the weaknesses of Exchange 2007's Unified Messaging implementation is that it does not turn on and off the message waiting indicator (MWI) on your telephone. Of course, if you think about it, that would be a pretty complex thing to do since there are so many different types of phone systems and phone switches.Two third party vendors have emerged that will do this requirement for many phone vendors, though:- Interactive Intelligence- Geomant   read more »