Microsoft published Update Rollup 6 for Exchange Server 2007 Service Pack 1. Update Rollup 6 for Exchange Server 2007 Service Pack 1 (KB959241) is now available for download: http://www.microsoft.com/downloads/details.aspx?FamilyID=93cb3f66-ae72-4356-bdbf-35029cff6df1&displaylang=en