Update Rollup 2 for Exchange Server 2007 Service Pack 1 (KB948016)

Update Rollup 2 for Exchange Server 2007 Service Pack 1 (SP1) resolves issues that were found in Exchange Server 2007 SP1 since the software was released. This update rollup is highly recommended for all Exchange Server 2007 SP1 customers.

https://www.microsoft.com/downloads/details.aspx?FamilyId=99DA32E0-D9E3-4156-AABF-8369BF96E3E7&displaylang=en