To check the service pack on Exchange 2003, navigate to the Control Panel, select Administrative Tools, and then Exchange System Manager. In the left pane, expand the server node, and then select the Servers node. Right-click the Exchange 2003 server, and then select Properties. The General tab will display the service pack information.
Keeping Exchange 2003 up to date with the latest service pack is important for security and performance reasons. Service packs include bug fixes, security updates, and new features. Installing the latest service pack can help to improve the stability and reliability of Exchange 2003, and can also help to protect it from security vulnerabilities.