A new demo has been added in the Exchange Server 2003 demo portion.The detail of this demo is

Title: How to Preview Search Filter Results of an E-mail Recipient Policy in Microsoft Exchange Server 2003

Objective: The objective of this demo/tutorial is to teach you how to preview search filter results of an e-mail recipient policy in Microsoft Exchange Server 2003. You can preview the results of the search filters you have selected. Previewing search results is helpful when testing a newly created recipient policy or when using custom searches involving an LDAP filter. You can choose different columns to see different aspects of recipient policy members.

If you are a subscriber, then click the Demos link in the navigation menu to view the complete list of demos.