Outlook lets you rearrange the folders you create in the folder pane.
Note: August 10, 2016: You might notice that the folder pane in Outlook has disappeared. The Outlook team is aware of this issue and actively investigating to release a fix. In the meantime, please go to View > Folder Pane > Normal, to turn the folder pane on. We will keep you posted on updates.
In the Folder Pane, drag the folder to a new location in the folder list.
Search Folders can’t be moved and is the last set of folders for an account.
Tip: You can also add folders to the Favorites section, which appears at the top of the Folder Pane.