Folders provide a way to organize email messages, calendars, contacts, and tasks in Outlook. In this video tutorial, you will learn how to organize your Outlook inbox using folders.
1. In the left pane of Mail, Contacts, Tasks, or Calendar, right-click where you want to add the folder, and then click New Folder.
2. In the Name box, enter a name for the folder, and press Enter.
3. To add a folder to Favorites, right-click the folder, and then select Show in Favorites.
Learn more: https://support.microsoft.com/en-us/office/organize-email-by-using-folders-0616c259-4bc1-4f35-807d-61eb59ac79c1