If Outlook Folders are Not Showing issue occurs, try recovering the folder from the trash. If you accidentally deleted an Outlook folder but haven't yet cleared the folder's Deleted Items, use this technique. A deleted Outlook folder can be quickly recovered and sent back to its original location. Examine your system trash can as well as the garbage in MS Outlook. Any one of those locations could contain the deleted folder. Attempting to retrieve the folder from the server is another option.