Exchange 2000 Post-Service Pack 3 (SP3) Rollup Patch 6556.4
This patch resolves problems that were found in Exchange 2000 since SP3 was released.
View: Microsoft Knowledge Base Article - 836488
More Information & Download: Exchange 2000 Post-Service Pack 3 (SP3) Rollup Patch 6556.4
Exchange 2003 Store Patch 6980.72
This patch resolves problems that were found in the Exchange 2003 Store since Exchange 2003 was released.