Microsoft has released Update Rollup 3 for Exchange Server 2010 Service Pack 2

Update Rollup 3 for Exchange Server 2010 Service Pack 2 resolves issues that were found in Exchange Server 2010 Service Pack 2 since the software was released. This update rollup is highly recommended for all Exchange Server 2010 Service Pack 2 customers.

  Update Rollup 3 for Exchange Server 2010 Service Pack 2 (KB2685289)