This week Microsoft published three such Exchange 2003 KB articles:
- The "Exchange Server 2003 interoperability and migration guide" is available
http://support.microsoft.com/default.aspx?scid=kb;EN-US;867646
This guide explains how to migrate non-Exchange messaging systems such as Lotus Notes, Lotus Domino, and Novell GroupWise to Microsoft Exchange Server 2003.
- The "Using ISA Server 2000 with Exchange Server 2003" technical article is available
http://support.microsoft.com/default.aspx?scid=kb;EN-US;867711
This guide explains the pmeans to protect and publish Exchange 2003 behind Microsoft first Firewall offering, ISA Server 2000.
- The "Planning an Exchange Server 2003 messaging system" guide is available
http://support.microsoft.com/default.aspx?scid=kb;EN-US;867644
Updated version of the Exchange 2003 planning guide, targeted mostly at large deployments. It has four revised chapters and is really worth reading for medium and large companies migrating from Exchange 5.5 to Exchange 2003.

