It's common for email users to accidentally delete their email messages, and Microsoft Outlook is no different. If you've accidentally deleted an email message from Outlook, don't panic. In many cases, you can get the deleted email back.
Another common problem that email users have is not considering their email's auto-archive feature. The AutoArchive feature in Outlook automatically sends old messages to the Archive folder, which can make it seem like those messages have disappeared to the unsuspecting user. Fortunately, it's not too difficult to retrieve archived emails in Outlook.