Microsoft has again re-released Rollup 8 for Exchange 2007 SP1 to address an issue in which digital signatures on files produced and signed by Microsoft will expire prematurely.
Download: Update Rollup 8-v3 for Exchange Server 2007 Service Pack 3 (KB2778154)
View: Original list of fixes in Update Rollup 8 for Exchange 2007 SP3 (KB2734323)
View: Microsoft Security Advisory 2749655
