Why do people think they need Micky-Squish virus server?
There are plenty of alternative out there, with heaps of functionality for a lot less money. I piloted this product for our company and found it to be very nice and compatable with outlook on windows. IEMS also supports Outlook compatible calendaring and scheduling, allowing for a natural migration path from Microsoft Exchange.. Highly recommended.
So why are we still using exchange?
Because the CEO wanted his own blackberry server