"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.

For a list of changes that are included in this update rollup, see KB948016.

This update rollup does not apply to Exchange Server 2007 Release To Manufacturing (RTM). For a list of update rollups applicable to Exchange Server 2007 RTM, refer to the section Update rollups for Exchange Server 2007 RTM in the Knowledge Base article KB937052.

This is a cumulative update rollup and replaces the following:

KB945684 Update Rollup 1 for Exchange Server 2007 Service Pack 1 (KB945684)"