This feature requires you to use a Microsoft Exchange Server 2000, Exchange Server 2003, or Exchange Server 2007 account in Cached Exchange Mode. Most home and personal accounts do not use Microsoft Exchange. For more information about Microsoft Exchange accounts and how to determine which version of Exchange your account connects to, see the links in the See Also section.
You can access the public folders that are displayed in the Favorites folder under Public Folders when you don't have a connection to your mail server or you are working offline.
On the Tools menu, click Account Settings.
On the E-mail tab, select the Exchange Server e-mail account, and then click Change.
Click More Settings, and then click the Advanced tab.
Under Cached Exchange Mode Settings, select the Download Public Folder Favorites check box.
Note: Only your public folder items in the Favorites folder are downloaded.