Exchange 2000 Server SP3 Patches
You can download SP3 for Exchange 2000 right here:
Download Exchange 2000 SP3 (165mb)
If you’re running Exchange 2000 with SP3 on a Windows 2000 box with SP4 you should apply the following security-related patches:
This Update Rollup resolves problems that were found in Exchange 2000 since Exchange 2000 SP3 was released.