Received an email today and opened it on my iPad. It contained a download link (not a fraud, I knew what it was) which I wanted on the PC so I opened Outlook on the PC. The email now said "This message is no longer stored on the server".
Funny - I always use IMAP of course so where's the email gone? Refreshed Outlook to no avail. Eventually moved the (non-existant) email into a different folder - lo and behold it reappeared. Moved it back to the Inbox and all was well.
Some sort of odd cacheing issue I suppose - not seen it before though.
Democracy - 3 wolves and a lamb voting about what to have for lunch!