I have 2 users reporting that, on random occasions they have noticed random emails disappear out of their email (inbox or subfolder) then reappear later. It's not all emails in the inbox or folder, just one or two. Users swear that the message was in their inbox.
For example, Sally receives an email from Bob about a report they are working on. Sally reads the message and leaves it in her inbox. A few days later Sally searches for that message again and search cannot find it, nor can she find it scrolling back thru her inbox. But if she closes outlook and reopens outlook and tries again, she finds the message.
We are on Outlook 2013, Exchange 2010 (sp3, RU10), Outlook is running with cache mode enabled and some of these users probably have larger *.ost files.
Reproducing this issue is impossible because it is random. And catching it when it happens to run tests or take a look is just as hard because when the user is searching for those messages, they are usually in a rush and don't report the issues until after they have restarted outlook, found the missing email and taken care of their work before reporting it to IT as an afterthought.
Now, I know, I've had the occasion where I've looked for something in my email that I know I saved and can't find it, but I try a second time and it's there - and I usually chalk up the oversight to stress and being busy. But these users swear up and down that the messages are "not there" and then reappear later.
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