You can now assign multiple MFA devices in IAM | Amazon Web Services
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At Amazon Web Services (AWS), security is our top priority, and configuring multi-factor authentication (MFA) on accounts is an important step in securing your organization. Now, you can add multiple MFA devices to AWS account root users and AWS Identity and Access Management (IAM) users in your AWS accounts. This helps you to raise the […]

Has anybody gotten this to work? If I set up multiple MFA devices with my IAM accounts, they all work flawlessly. But if I set up multiple MFA devices with my root account, only the original MFA device works. No matter how carefully I set up and synch a secondary device, it simply will not work with root. As the linked article says, this should be possible with either root or IAM (though in the past this was not the case). Thanks.