I have some users interested in getting iPhones and using them in our Exchange 2003 environment. I am curious to know what functionality is possible through the iPhone with Exchange. Do you have access to all of the same features you would with a Windows mobile phone? Specifically calendars, tasks, and inbox folders. In a corporate environment is an iPhone a viable option? We have several Windows mobile users that love the capability, I am afraid they arent going to have the same functionality with an iPhone.