What should an organization do if MS-CHAPv2 sign-in stops working?
Inventory the affected authentication path and follow Microsoft’s audit guidance. Microsoft recommends removing MS-CHAPv2 dependencies and moving Wi-Fi and VPN authentication to certificate-based methods; any temporary registry configuration should follow its documented change-control guidance.
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Windows’ October NTLMv1 Change Could Break Old VPN and Wi-Fi Sign-InsMicrosoft’s October update tightens NTLMv1-derived SSO credentials on supported Windows versions. Find MS-CHAPv2 dependencies before VPN or Wi-Fi access fails.
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