HKEY_CURRENT_USER\Software\Microsoft\Exchange\AlwaysUseMSOAuthForAutoDiscover HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\Version HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\EnableADAL Outlook 2013 supports Modern Authentication but you need to add the following two registry keys.Outlook 2010 doesn’t support Modern Authentication. Login as admin, expand Settings, click Org Settings, Select Modern Authentication and turn it on. Make sure Modern Authentication is turned on on the Office 365 Portal. In Office 365 two factor authentication (2FA), App Password is used for older versions of Microsoft Outlook or for non Microsoft email clients on devices like MACs or smart phones.Īfter enforcing 2FA in Office 365 and if you are trying to configure Outlook 2016 for email, and Outlook keeps rejecting the password that you have been using and that works with OWA, while if you try the App Password it works in Outlook, then you might want to add a registry key to enable and enforce Modern Authentication.
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