Multi-Factor Authentication in Exchange Server can be enabled in multiple ways, including OAuth. Supported authentication mechanisms are configured independently on a per protocol endpoint basis. In Exchange Server, authentication configuration settings for client endpoints are not shared across protocols.The reported technique does not pose a risk to Exchange Server or Office 365: We have determined that the technique described is not a vulnerability and the potential bypass does not exist on properly configured systems. Microsoft has evaluated recent reports of a potential bypass of 2FA. To learn more about Conditional Access, see What is Conditional Access? For more information about creating Conditional Access policies, see Create a Conditional Access policy.Multi-Factor Authentication (MFA), which includes Two-factor authentication (2FA), in Exchange Server and Office 365, is designed to protect against account and email compromise. Require Azure AD MFA registration - Requires Azure AD Identity Protection, which is part of Azure Active Directory Premium P2.If you want to use Conditional Access to configure policies, see the following step-by-step guides: Enterprise Mobility & Security E3 or E5.Azure Active Directory Premium P1 or P2.Security defaults are available to all customers, while Conditional Access requires one of the following plans: Conditional Access policies can be granular and specific, empowering users to be productive wherever and whenever, but also protecting your organization. If your company or business has complex security requirements or you need more granular control over your security policies, then you should consider using Conditional Access instead of security defaults to achieve a similar or higher security posture.Ĭonditional Access lets you create and define policies that react to sign-in events and request additional actions before a user is granted access to an application or service. To turn security defaults on, use the drop-down menu to select Enabled. On the right side of the screen, in the Security defaults pane, see whether security defaults are turned on ( Enabled) or off ( Disabled). In the navigation pane, select Properties, and then select Manage security defaults. Under Manage Azure Active Directory, select View. You must be a Security Administrator, Conditional Access administrator, or Global Administrator to perform this task.
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