On 11/13/2012 Microsoft released Rollup 5 for Exchange Server 2010 SP2
After you install this Rollup 5 you will update Exchange Server 2010 SP2 version number to 14.2.328.5
more information:
Exchange Server 2010 Service Pack 2 Rollup 5 (KB2719800)
you can download update from
Update Rollup 5 for Exchange Server 2010 Service Pack 2 (KB2719800)
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