![]() Office 365 users may experience a small delay in activation of MFA on all protocols due to propagation of configuration settings and credential cache expiration.Īdditional information on enabling OAuth in Office 365 and Exchange Server can be found on and MSDN. Outlook on the Web (OWA) and Outlook client access are also enabled in Office 365. Select Azure Active Directory, Properties, Manage Security defaults. Select Show All, then choose the Azure Active Directory Admin Center. Go to the Microsoft 365 admin center at 2. Exchange Web Services (EWS) is an Office 365 client endpoint which is enabled. Check out this video and others on our YouTube channel. ![]() In Office 365, when Azure MFA is enabled within a tenant, it is applied to all supported client protocol endpoints.Before implementing MFA with Exchange Server it is important that all client protocol touchpoints are identified and configured correctly. 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.This will enable MFA for the user, and the next time they login to Office 365 on the web, they’ll have to go through a process of setting. On the confirmation screen, click Enable Multi-Factor Authentication. To the right of the table of users, click the Enable option that appears. For some users it makes sense to set this up, but some others don't have a company business phone and therefore cannot legally be asked to set it up since it only gives the App option. Once you go to setting -> passwords & accounts -> add account and hit Outlook you get redirected to the Outlook sign in page. Select the users for whom you want to turn MFA. The reported technique does not pose a risk to Exchange Server or Office 365: To me it looks like it wasn't setup, yet it still asks for the multi-factor auth setup each time someone logs into their Office 365 mailbox or tries to use Teams. 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. 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.
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