We have our email hosted by a web hosting company. Our iPhones and Outlook on our Desktop both use IMAP protocol. However, when we read a message in Outlook, it doesn't mark the message as read on our iPhone. I looked all over for settings, but can't find anything. Our email provider said its not them. Is there a setting I may have overlooked? This never was an issue until sometime around iOS 6.0 came around.
This does not happen with all emails either. Only about half.