Create a folder in Outlook - support.microsoft.com
support.microsoft.com › en-us › officeFolders provide a way to organize email messages, calendars, contacts, and tasks in Outlook. To add a folder to the folder pane, do the following: In the left pane of Mail, Contacts, Tasks, or Calendar, right-click where you want to add the folder, and then click New Folder. Note: When in Calendar, the New Folder command is replaced with New Calendar.
Working with message folders in Outlook.com
support.microsoft.com › en-us › officeCreate a new folder. At the bottom of the folder pane, select New folder. You might need to scroll down in the folder list to see New folder. In the new folder box, enter a name for the folder and then press Enter. When you create a new folder, it is added in alphabetical order below the Archive folder. Create a new subfolder