By using Search Folders, you can quickly find all messages for which the level of importance is set to Importance: High, irrespective of the folder in which they are located. Messages with the setting Importance: High appear in the message list with the following icon.

Note To find any message or Outlook item quickly, use Instant Search.
To find all messages with the level of importance set to Importance: High, do the following:
- In Mail, on the File menu, point to New, and then click Search Folder.
Tip To open the New Search Folder dialog box, press CTRL+SHIFT+P.
- Under Select a Search Folder, in the Reading Mail section, select Important mail.
- In the Search mail in list, select the mail delivery location that this Search Folder will include, and then click OK.
A new Search Folder called Important Mail is created in the Navigation Pane (Navigation Pane: The column on the left side of the Outlook window that includes panes such as Shortcuts or Mail and the shortcuts or folders within each pane. Click a folder to show the items in the folder.) under Search Folders.
Note Search Folders are specific to a mail delivery location. For example, your delivery location might be your Microsoft Exchange mailbox or a Personal Folders file (.pst) (Personal Folders file (.pst): Data file that stores your messages and other items on your computer. You can assign a .pst file to be the default delivery location for e-mail messages. You can use a .pst to organize and back up items for safekeeping.) for a POP3 e-mail account. To search multiple delivery locations, you must create a Search Folder for each delivery location.
Tip To make a Search Folder appear in the Favorite Folders (Favorite Folders: A pane located on top of the Navigation Pane that has copies of your Inbox, Sent Items, and so on. You can add, remove, and arrange folders in this pane. Collapse or expand the pane by clicking the arrow in the Favorite Folders header.)
pane, right-click the Search Folder, and then click Add to Favorite Folders. You can drag Search Folders up or down in Favorite Folders to arrange them in the order of your preference.