Outlook comes with 13 predefined Search Folders, but only 3 of them are enabled when you first start Outlook. You can enable any of the other predefined Search Folders, disable the Search Folders that are enabled by default, and create your own custom Search Folders. The following predefined Search Folders are enabled by default when you open Outlook:
For Follow Up
Figure 5.1 shows these three Search Folders in the Folder List in the Navigation Pane.