Exchange OWA Admin Tool
In doing some additional research on Exchange 2003, I ran across this posting on the Exchange Team Blog. It's the Exchange OWA Admin Tool. I haven't used it yet, but will be toying with it today. I'll give my thoughts later.
Update: Here's my followup evaluation/feature list: http://weblogs.asp.net/conrad/archive/2005/01/19/355871.aspx