Conditional Access authentication strengths for guests
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title: Conditional Access - Authentication strength for external users
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description: Create a custom Conditional Access policy with authentication strength to require specific multifactor authentication (MFA) methods for external users.
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ms.topic: how-to
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−ms.date: 04/01/2025
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+ms.date: 03/24/2026
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ms.reviewer: inbarc
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---
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# Require multifactor authentication strength for external users
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