What could cause messages to go back to unread
Problem reported by Mark DeLore - 3/1/2016 at 6:46 PM
I have Outlook 2010 at office set to access email via IMAP and I marked all emails as read before leaving.
I check from home 90 minutes later with Thunderbird that I also set as IMAP and all the emails show unread.
I mark them as read and the next time it checks emails, they are all back to unread.

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