The release of the rollup via Microsoft Update will happen on October 12th.
This update includes new fixes for the following server roles:
In particular we would like to call out the following fixes which have been included in this release:
Download details: Update Rollup 1 for Exchange Server 2010 Service Pack 1 (KB2407028)http://www.microsoft.com/downloads/en/details.aspx?FamilyID=a371fa96-e85b-4a4f-8242-15d56595d0ec&displaylang=en
Have a nice weekend.