I know that Exchange Online is based on Exchange 2007, and soon will migrate a Exchange 2010. My questions is: What features offers Exchange Server On premise that Exchange Online is missing?? Regards,

This is a loaded question. There is no definitive list (though some attempts), however any global-type setting would not be available to you in BPOS-S as it is a shared environment. Also, the exposure to the management tools is very limited and much of the administrative tasks are accomplished via support ticket. Finally, much of the ability to integrate with other products like OCS an SharePoint are not yet possible. We hope to see big improvements when the 2010 version is complete and rolled out. Having said this, Exchange is Exchange is Exchange. So the features and functionality you are used to are still there, regardless of hosted/not. Mike Crowley Check out My Blog!

Thank you

Mike. What do you means much of the ability to integrate with other products like OCS an SharePoint are not yet possible?? Regards