DEVELOPMENT SERVER
Rules to Better Email

Public folders can't work offline unless you have them added to the Favorites folders. This is necessary because you can't keep connected with the Internet all the time.
After you add a public folder into your Favorites folder, outlook can synchronize it to your local machine automatically, so that you can work offline with the public folder.
If there are many public folders, just keep the current release public folders synced.

Figure: Good Example - Work offline with the Public folder