This is the latest hotfixes that updates the NTDSAI/NTDSA.dll (The Directory Service Agent) by Operating System.
Windows Server 2012 R2:Address AD object renaming issues when success auditing is enabled:
http://support.microsoft.com/kb/2862304/en-US
Windows Server 2012:
AD DS or AD LDS responds slowly to complex LDAP query that has a deeply nested filter on Windows server:
http://support.microsoft.com/kb/2862304/en-US
Windows Server 2008 R2 SP1:
AD DS or AD LDS responds slowly to complex LDAP query that has a deeply nested filter on Windows server:
http://support.microsoft.com/kb/2862304/en-US
Windows Server 2008 SP2:
Lsass.exe process crashes and error code 255 is logged because of a CNF NTDS Settings object in Active Directory on Windows
http://support.microsoft.com/kb/2913087/en-US
Windows Server 2003 SP2:
MS13-032: Description of the security update for Active Directory: April 9, 2013:
http://support.microsoft.com/kb/2772930/en-US