Create a folder in Outlook - Microsoft Support
support.microsoft.com › en-au › officeTo 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. In the Name box, enter a name for the folder, and press Enter. Need more help?