Microsoft liberó el Security Rollup correspondientes para las versiones de Exchange:

· Update Rollup 3 for Exchange Server 2007 SP1 (KB 949870)

· Update Rollup 7 for Exchange Server 2007 RTM (KB 953469)

Información de descarga para el Update Rollup 3 para Exchange 2007 SP1

http://www.microsoft.com/downloads/details.aspx?FamilyId=63E7F26C-92A8-4264-882D-F96B348C96AB&displaylang=en

http://support.microsoft.com/?kbid=949870

Información de descarga para el Update Rollup 7 para Exchange 2007 RTM

http://www.microsoft.com/downloads/details.aspx?FamilyId=086A2A13-A1DE-4B1D-BD12-B148BFD2DAFA&displaylang=en

http://support.microsoft.com/?kbid=953469

Saludos,
Pablo Vernocchi
Microsoft Exchange MVP
MCSE + M / MCSE + Sec
https://mvp.support.microsoft.com/profile/Pablo