Hard1 markMultiple Choice

AWS SAA-C03 · Question 12 · Domain 1.1: Secure Access

A company wants to enforce a policy that all IAM users must use Multi-Factor Authentication (MFA). If a user does not have MFA enabled, they should only be able to manage their own credentials and MFA device, and should be denied access to all other AWS services. <br/><br/>How can a solutions architect implement this requirement?

Answer options:

A.

Use AWS Config to detect users without MFA and automatically delete their IAM accounts.

B.

Create an IAM policy that uses the aws:MultiFactorAuthPresent condition key set to false to deny all actions except IAM credential management.

C.

Enable the 'Require MFA' setting in the AWS IAM Account Settings console.

D.

Create a Service Control Policy (SCP) that denies access to the AWS Management Console without MFA.

How to approach this question

Look for the IAM condition key specifically designed for MFA enforcement.

Full Answer

B.Create an IAM policy that uses the aws:MultiFactorAuthPresent condition key set to false to deny all actions except IAM credential management.✓ Correct
You can use the `aws:MultiFactorAuthPresent` condition key in an IAM policy to check if MFA was used during authentication. By creating a policy that denies `NotAction` (everything except IAM self-management) when this key is `false`, you force users to enable MFA.

Common mistakes

Assuming there is a simple global toggle switch for this in the IAM console.

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