We know that many of you are anxiously awaiting the release of our quarterly Exchange updates planned for November. Earlier today the Exchange Team decided to hold the release of these packages until December. We made this decision to provide more time to resolve a late breaking issue in the Installer package used with Exchange Server 2013. We have discovered that in some instances, OWA files will be corrupted by installation of a Security Update. The issue is resolved by executing an MSI repair operation before a Security Update is installed. We do not believe this is acceptable behavior and is unfortunately something that customers might only discover after they install a Security Update.
As of this blog announcement, we believe the installer defect is limited to Exchange Server 2013. However, we are also evaluating previous versions of Exchange Server and are delaying the planned 2007 and 2010 releases as well to complete that investigation.
The Exchange team remains committed to ensuring that our customers have the best possible experience and because of that we have opted to delay the November releases to address this issue.
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