This document provides an overview and lessons for a Microsoft Outlook 2007 training course on retrieving, backing up, or sharing messages. The training covers opening personal storage (.pst) files and personal or archive folders in the navigation pane to access stored emails, as well as best practices for tasks like backing up emails and recognizing file contents. The lessons demonstrate how to use stored messages by opening, forwarding, replying to, and searching for emails within pst files.