If your missing email is the Archive folder you can drag-and-drop it from there to the folder where you want it to be. Use the same drag-and-drop technique I described above for the Deleted Items folder.

You can also retrieve an archived message using the Move tool to move an archived message into another folder.

Finally, you may be able to retrieve Outlook email messages stored on your computer in PST format.

You can avoid the need to constantly be retrieving emails that were accidentally archived by understanding and adjusting the Outlook AutoArchive option, so I’m going to discuss the settings now.