MCSA: Messaging on Windows Server 2003

Microsoft Certified Professional 70-284
Implementing and Managing Microsoft Exchange Server 2003

Microsoft Certified Professional 70-290
Managing and Maintaining a Microsoft Windows Server 2003 Environment

Microsoft Certified Professional 70-291
Managing and Maintaining a Microsoft Windows Server 2003 Network Infrastructure

Microsoft Certified Professional 70-270
Installing, Configuring, and Administering Microsoft Windows XP Professional