Microsoft Exchange 2000 Server Service Pack 2 (SP2) contains fixes for nearly 3000 problems reported since Exchange 2000's initial release. Microsoft has made available a white paper with technical information about the changes and fixes that Exchange 2000 SP2 introduces. The Exchange 2000 Service Pack 2 Deployment Guide (available at the URL below) also offers tips for deploying the service pack.

http://www.microsoft.com/exchange/techinfo/deployment/2000/sp2deployment.asp