Downloading an IMAP (IMAP (Internet Message Access Protocol): Unlike Internet e-mail protocols such as POP3, IMAP creates folders on a server to store/organize messages for retrieval by other computers. You can read message headers only and select which messages to download.) folder list displays all folders that are created with your account on the server. You can then select which folders you want to subscribe to or view on your computer.
To display the folders when you want to subscribe or unsubscribe
To display the folders in the Microsoft Outlook Navigation Pane
Note In the IMAP Folders dialog box (Tools menu, IMAP Folders command), if the When displaying hierarchy in Outlook, show only subscribed folders check box is selected, only the folders you are subscribed to will appear when you download folders.