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https://social.technet.microsoft.com/wiki/contents/articles/32211.modern-authentication-behavior-across-office-2013-and-office-2016.aspx
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| Include Page |
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| Enable Exchange Online for modern authentication |
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| Enable Exchange Online for modern authentication |
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| Enable Skype for Business Online for modern authentication |
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| Enable Skype for Business Online for modern authentication |
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Enhanced Clients
Those client applications that do not support modern authentication are called Enhanced Clients. You will not be able to protect Enhanced Clients with MFA, unfortunately.
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