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Question 3 of 127
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Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
User2 does not have an MS account so every time he signs into the system he'll receive an email "Email One-Time Passcode for guests" applies only to guest users who do not have a Microsoft account (MSA) or an Azure AD account in a trusted organization. It’s a fallback authentication method for external users when they try to access shared content.
User2 is an external user without an existing guest account and will receive a passcode.
For security, all guests must authenticate. This is MFA. Therefore, the answer is C - User 1 and User 2 https://learn.microsoft.com/en-us/entra/external-id/one-time-passcode "One-time passcodes are valid for 30 minutes. After 30 minutes, that specific one-time passcode is no longer valid, and the user must request a new one. User sessions expire after 24 hours. After that time, the guest user receives a new passcode when they access the resource. Session expiration provides added security, especially when a guest user leaves their company, or no longer needs access."