Exchange 2003 and Active Directory. Chapter one of Steve Bryant's free eBook “The Expert's Guide for Exchange 2003: Preparing for, Moving to, and Supporting Exchange Server 2003” has been published over at Windows & .Net Magazine.
“This eBook will educate Exchange administrators and systems managers on how to best approach the migration and overall management of an Exchange 2003 environment. The book will focus on core issues such as configuration management, accounting, and monitoring performance with an eye toward migration, consolidation, security and management.”