Microsoft Security Advisory (973811): Extended Protection for Authentication - Version: 1.12

Revision Note: V1.12 (April 12, 2011): Updated the FAQ with information about a non-security update enabling Microsoft Outlook to opt in to Extended Protection for Authentication.
Summary: Microsoft is announcing the availability of a new feature, Extended Protection for Authentication, on the Windows platform. This feature enhances the protection and handling of credentials when authenticating network connections using Integrated Windows Authentication (IWA).

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