How to add a new folder to MS Outlook folder list

Right-click the main (parent) folder that you poverty to create the folder in.Click "New Folder…" from the menu that appears.Enter the name you want to christen the booklet (in the "Name" deed box).From the "Folder contains" drop-down menu, select what you want to position the new folder.Click the OK button.

Source: http://www.jkg.in/215-how-to-add-a-new-folder-to-ms-outlook-folder-list/