Forum Discussion
Modern Auth: Clear as mud
As mentioned in the documentation: https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/enable-or-disable-modern-authentication-in-exchange-online
Spoiler-
Enabling or disabling modern authentication in Exchange Online as described in this topic only affects modern authentication connections by Outlook 2013 or later clients.
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Other email clients that support modern authentication (for example, Outlook Mobile, Outlook for Mac 2016, and Exchange ActiveSync in iOS 11 or later) always use modern authentication to log in to Exchange Online mailboxes, regardless of whether you enable or disable modern authentication for Outlook 2013 or later clients as described in this topic.
And in case you've missed it: https://blogs.technet.microsoft.com/exchange/2019/04/01/exchange-online-modern-authentication-and-conditional-access-updates/
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As mentioned in the documentation: https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/enable-or-disable-modern-authentication-in-exchange-online
-
Enabling or disabling modern authentication in Exchange Online as described in this topic only affects modern authentication connections by Outlook 2013 or later clients.
-
Other email clients that support modern authentication (for example, Outlook Mobile, Outlook for Mac 2016, and Exchange ActiveSync in iOS 11 or later) always use modern authentication to log in to Exchange Online mailboxes, regardless of whether you enable or disable modern authentication for Outlook 2013 or later clients as described in this topic.
And in case you've missed it: https://blogs.technet.microsoft.com/exchange/2019/04/01/exchange-online-modern-authentication-and-conditional-access-updates/