Update Rollup 4 for Exchange Server 2007 Service Pack 1 (KB952580) Update Rollup 4 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… Continue reading Update Rollup 4 for Exchange Server 2007 Service Pack 1 (KB952580)