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Multi-factor authentication (MFA) is one of the most effective defences against identity-based attacks. Microsoft reports that MFA blocks more than 99.9% of account compromise attacks. In Entra ID, MFA is deeply integrated with Conditional Access and can be deployed across an organisation with minimal friction.
MFA requires users to provide two or more verification factors from different categories:
| Factor Category | Description | Examples |
|---|---|---|
| Something you know | A secret the user memorises | Password, PIN |
| Something you have | A physical object the user possesses | Phone, hardware key, smart card |
| Something you are | A biometric characteristic | Fingerprint, facial recognition |
A sign-in that requires a password (something you know) and an authenticator app notification (something you have) is two-factor authentication — the most common form of MFA.
Entra ID supports several second-factor methods:
The recommended method. It supports:
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