Originally Posted by squaresailor
Not sure if this will help but I have my exchange account on my Droid set to only show the last five days worth of emails, as time rolls along emails drop from my phone but are still on the exchange server. I don't know if there is a more selective way to get rid of messages on the phone.
That worked for me as a temporary fix! I set my Evo to only download the last day's emails and it showed nothing. I switched to 3 days, and it pulled up old emails from the server. I switched it back and it synced again to no emails, but left the older ones on the server. And thank you, Cuda13 for pointing out that the deleted emails would be in the Outlook Deleted Items folder, so I got back my 3 weeks of emails!