msexchange.org: Office 2013 modern authentication public preview announced

Later this month we will release an update to the Office 2013 Windows client applications that enables new authentication flows, including support for Multi-Factor Authentication (MFA). These new authentication flows are enabled by the Active Directory Authentication Library (ADAL). The update for ADAL based authentication will be disabled by default for all users of Office 2013 Windows clients, and the previous sign in authentication stack based on the Microsoft Online Sign-In Assistant will continue to be used by default. The updated authentication features will be available in private preview starting with the November 2014 update. This blog post talks about the new features that are enabled by the ADAL sign-in authentication stack and when you should consider enabling that stack.



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