Title: Query-based Distribution Groups Author: Marc Grote Summary: A query-based distribution group is a new additional type of distribution group in Exchange 2003. This new type of distribution group provides the same functionality as a standard distribution group; however, instead of specifying static user memberships, a query-based distribution group allows you to use an LDAP query to dynamically build membership in the distribution group (for example All employees with a special group membership). Using query-based distribution groups we can reduce the administration costs dramatically. However a Query-based Distribution Group needs more Server resources like CPU power and RAM. Link: http://www.MSExchange.org/pages/article.asp?id=617