Modern Authentication is a more secure method to access data as compared to Basic Authentication. Step 2: Disable legacy authentication in Exchange Online The attribute values for on-premises users are synchronized to Exchange Online only for users that have a valid Exchange Online license. Office 2013 client apps support legacy authentication by default. In this article, I’ll focus on how to disable and clean legacy auth attempts from your services and users in the cloud. Microsoft first announced that they would disable legacy authentication in the Exchange Online Service 13th of October 2020. Microsoft’s official stance on removing your legacy hybrid Exchange server is that you must also disable Directory Synchronization, and move to a “cloud-only” scenario.

Azure AD Conditional Access Conditional Access is P1 feature in Azure AD that allows us to control which users, devices and applications are allowed, or not allowed to log in to and… Note: If 'false' is returned, the Exchange online server is not configured for Modern Authentication. Disable legacy authentication exchange 2016 The Apple native app should use Legacy (Basic) authentication, even if the app supports Modern Auth.