The update RollUp 2 for Exchange Server 2010 Service Pack 2 has been released. The update can be downloaded here:
http://www.microsoft.com/downloads/de-de/details.aspx?familyid=6b2fb2d9-df78-4cef-8ea3-2a913a89ac4a
A list of the included fixes can be found here:
http://support.microsoft.com/kb/2661854
Furthermore, the Update Rollup 7 for Exchange Server 2007 Service Pack 3 has been released, this rollup is available here:
http://www.microsoft.com/downloads/de-de/details.aspx?familyid=51d1079c-b5e2-418d-9431-0e556917c5de
and also the list of fixed problems:
http://support.microsoft.com/kb/2655203
