I'm thankful I've never had this issue myself, however I have seen a university professor who didn't know in Outlook Web Access (2003) that you could click through to pages 2, 3, 4 etc. of e-mails. Hence when he was at a lab PC and using OWA instead of Outlook on his main PC, his method of accessing an older e-mail was to delete things until the old e-mail came into view on page 1, then restore the e-mails again from Deleted Items when he'd finished.
It was really, really hard to maintain a straight face as I told him that clicking the right/left arrow icons would allow him to move to page 2, 3 and beyond of his inbox...
Biting the hand that feeds IT
