Released: Update Rollup 3 for Exchange 2010 SP1 and Exchange 2007 SP3
Update Rollup 3 for Exchange Server 2010 Service Pack 1 resolves issues that were found in Exchange Server 2010 Service Pack 1 since the software was released. This update rollup is highly recommended for all Exchange Server 2010 Service Pack 1 customers.
For a list of changes that are included in this update rollup, see KB2492690.
Download it from here: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=413b8979-76b8-4be4-a18b-015d025eb368&displaylang=en