iPhone This Message Has Not Been Downloaded From The Server SOLVED!
Seems that Exchange 2010 SP1 knocked our iPhones out of sync with our Exchange server. iPhones could no longer view full emails, headers were downloaded but when opening the message the error: This Message Has Not Been Downloaded From The Server on the iPhone was received. After much research and lots of people having similar issues we found help from user TimMapes on the ExchangeTechnet Forums. After trying many scripts and other fixes it appears all that’s needed is to reset the default Accepted Domain in Exchange! We simply set a second domain as the default then set our original 1stopsupport.com domain back as the default. Low and behold opening an email on the iPhone now worked 1st time!
Such an easy fix but not something you’d naturally try as the correct domain was already set as default! Hope this helps if others are experiencing the same issue!