Hi, we are actually in migration scenario from 2007 latests rollup to 2013 CU9.
Once we migrate a mailbox from 2007 to 2013 the iphone stop opening the email , showing the message "the message has not been downloaded from the server", all seems working fine, with contacts,calender and send receiving message.
But when a user try to open the email got that error.
if we move the mailbox back to 2007, the iphone restart opening mesagges - we tryed with 8.4 and 9 ios ....
Any suggestions ?