Retrieving an Outlook missing email message is fairly easy if you know which folder it is in (or if you can guess). The missing email can either be copied back to the correct location. If you prefer, you can drag it there. These are the two methods that you can apply to recover your outlook missing folders -

1. Move the Retrieved Messages to the Original Folder

2. Retrieve Outlook Messages Using Drag and Drop



For more read -https://emailspedia.godaddysites.com/f/why-are-my-emails-not-displaying-in-outlook