Token protection and token theft in Microsoft 365

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Token protection and token theft in Microsoft 365

Token theft has become a leading attack pattern. Here's how it works and what Microsoft 365 offers to defend against it.

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What is token theft in Microsoft 365?

Stealing a valid session or refresh token from a device — via malware, a malicious browser extension, or an adversary-in-the-middle phishing proxy — and replaying it from the attacker's machine. Because the token alread…

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What does Conditional Access token protection do?

Token protection binds the refresh token cryptographically to the device it was issued on, so a token stolen and replayed elsewhere is rejected. It currently covers Windows devices with Entra join or hybrid join and a s…

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How do I defend against token theft without token protection?

Phishing-resistant MFA to stop adversary-in-the-middle proxies from working at all, compliant-device requirements so a token cannot be minted on an unmanaged machine, short sign-in frequency for sensitive apps, Continuo…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/token-protection-and-token-theft

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