TechRepublic recently ran an article (November 23, 2009) by Erik Eckel which described the steps IT should take to try to ensure that an organization keeps Exchange running smoothly. We think it is a great advertisement for Google Apps, and Google Mail, specifically. The 10 steps listed amount to a huge amount of non-value-added work, depleted resources, overtaxed servers and unnecessary tasks when compared against cloud-based Google Mail. And the end result? Mailboxes of 2GB for select users only, and the chance to do it all over again on a scheduled basis to ensure nothing breaks. Oh - don't forget about the privilege of paying significantly more for the opportunity to manage the Exchange system.
You can read for your yourself here.