Update Rollup 3 for Exchange Server 2010 Service Pack 2 has been released and can be downloaded here:
http://www.microsoft.com/de-de/download/details.aspx?id=29899
A list of fixed problems can be found here:
http://support.microsoft.com/kb/2685289/en-us
Wann wird dieses Update wohl über die automatischen Windows Updates verfügbar sein?