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AWS Certified Solutions Architect study material · question 17 of 500

An administrator enables MFA on the account root user. What is the effect on the IAM users in that account?

  1. All IAM users are immediately required to register an MFA device
  2. IAM users inherit the root user's registered device
  3. IAM users can no longer sign in until they federate
  4. None, because each IAM user configures its own MFA separately
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Answer: D. None, because each IAM user configures its own MFA separately

Enabling MFA on the root user protects only the root credentials; every IAM user is a distinct identity with its own MFA settings.

Source: AWS Multi-factor authentication in IAM (Amazon Web Services) — Multi-factor authentication

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