Op de website van Microsoft is Service Pack 1 te vinden voor Exchange Server 2003. De volledige release notes zijn als self-extracting archive te downloaden, maar kort samengevat had Microsoft het volgende over deze release te melden:
With Exchange Server 2003 Service Pack 1 (SP1), you can take advantage of updates and improvements to Exchange Server 2003 such as:
- Enhanced security
- Updated deployment tools to make Exchange Server 5.5 upgrades and site consolidation even easier
- New language support for Outlook Mobile Access and Outlook Web Access spelling checkers
- Enhancements to the Outlook Mobile Access user interface that include out-of-office modification, a larger text entry field, search folder support, and improved menu navigation
- Co-existence and migration support in a new Active Directory Connector and IBM Lotus Notes R6 Connector
- Updates and improvements based on your feedback [break] Microsoft Exchange Server 2003 draait alleen op Windows Server 2003 en Windows Server 2000, waarop minimaal Service Pack 4 is geïnstalleerd.