Update Rollup 4 for Exchange Server 2010 (KB982639)

The Rollup 4 for Exchange Server 2010, Service Pack 1 has just been released today 22/06/2011.

Description

Update Rollup 4 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.

You can download it from below location.

Update Rollup 4 for Exchange Server 2010 Service Pack1

http://www.microsoft.com/download/en/details.aspx?id=26554