Earlier today the Exchange CXP team released Update Rollup 2 for Exchange Server 2010 SP2 to the Download Center.
This update contains a number of customer-reported and internally found issues since the release of SP2 RU1. See KB2661854: Description of Update Rollup 2 for Exchange Server 2010 Service Pack 2 for more details.
Note: Some of the following KB articles may not be available at the time of publishing this post.
We would like to specifically call out the following fixes which are included in this release:
Note that this fix will not cause the CAS to CAS OWA proxying incompatibility with Exchange 2007 as discussed here. No additional updates are required on Exchange 2007 for proxying to work once Exchange 2010 SP2 RU2 is installed.
For DST Changes: http://www.microsoft.com/time.
Note for Forefront Protection for Exchange users For those of you running Forefront Protection for Exchange, be sure you perform these important steps from the command line in the Forefront directory before and after this rollup's installation process. Without these steps, Exchange services for Information Store and Transport will not start after you apply this update. Before installing the update, disable ForeFront by using this command: fscutility /disable. After installing the update, re-enable ForeFront by running fscutility /enable.