Hello @Bob James,
Thank you for posting your query on Microsoft Q&A.
From your description, I understand that you’re referring to the recent announcement about MFA enforcement, particularly the mandatory multifactor authentication for Azure and other administration portals starting on October 15, 2024. You’re asking whether this enforcement will support third-party MFA providers like DUO.
If you’re using a third-party MFA provider (DUO) for second-factor authentication and have configured it through the Conditional Access Custom Controls preview, it will not satisfy the new MFA requirements. To continue using your external solution with Microsoft Entra ID, you should migrate to the External Authentication Methods (EAM) preview.
If your DUO MFA is already configured through the External Authentication Methods preview, it will support the upcoming MFA enforcement requirements.
Additional Resources:
For more information, please refer to the following articles.
Planning for mandatory multifactor authentication for Azure and other administration portals
Manage an external authentication method in Microsoft Entra ID (Preview)
I hope this information is helpful. Please feel free to reach out if you have any further questions.
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Thanks,
Raja Pothuraju.