9. October 2012 07:42
These updates address an issue in which digital signatures on files produced and signed by Microsoft will expire prematurely, as described in Microsoft Security Advisory 2749655.
Also see Security Advisory 2749655 and timestamping on the Security, Research & Defense blog.
Update Rollup 4-v2 for Exchange Server 2010 Service Pack 2 (KB2756485)
Update Rollup 7-v2 for Exchange Server 2010 Service Pack 1 (KB2756496)
Update Rollup 8-v2 for Exchange Server 2007 Service Pack 3 (KB2756497)
The re-released Exchange 2010 SP2 RU4 includes the following additional fix:
2756987 Only one result is returned after you click "view all results" in Outlook 2010 or in Outlook 2013 in an Exchange Server 2010 environment
It is not required to uninstall the previous rollups to install the re-released rollups listed above.
Check what build you have installed