![]() ![]() Security defaults don’t block Exchange ActiveSync. Even if you have a Multi-Factor Authentication policy enabled on your directory, an attacker can authenticate by using an older protocol and bypass Multi-Factor Authentication.Īfter security defaults are enabled in your tenant, all authentication requests made by an older protocol will be blocked. Legacy authentication does not support Multi-Factor Authentication. Today, the majority of compromising sign-in attempts come from legacy authentication. ![]()
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