If you’re resetting your computer, changing your email app, or just playing around with something that could affect your emails, you may want to make a backup of your Microsoft Outlook emails through exporting them. Outlook allows you to export your messages in various formats. We’ll show you which one to use, depending on how you plan to use the exported emails (including working with them outside of Outlook). How to Export Emails From Outlook on Windows If you use Outlook on a Windows computer, you can export your emails to PST format.