To get the standalone package for these out-of-band updates, search for the KB number in the Microsoft Update Catalog. There is no action needed on the client side to resolve this authentication issue. This includes the removal of the registry key (CertificateMappingMethods = 0x1F) documented in the SChannel registry key section of KB5014754. If you used any workaround or mitigations for this issue, they are no longer needed, and we recommend you remove them. Resolution: This issue was resolved in out-of-band updates released for installation on all Domain Controllers in your environment, as well as all intermediary application servers such as Network Policy Servers (NPS), RADIUS, Certification Authority (CA), or web servers which passes the authentication certificate from the client being authenticated to the authenticating DC. Note: Any other mitigation except the preferred mitigations might lower or disable security hardening. If the preferred mitigation will not work in your environment, please see KB5014754-Certificate-based authentication changes on Windows domain controllers for other possible mitigations in the SChannel registry key section. Note: The instructions are the same for mapping certificates to user or machine accounts in Active Directory. For instructions, please see Certificate Mapping. Workaround: The preferred mitigation for this issue is to manually map certificates to a machine account in Active Directory. This issue only affects installation of May 10, 2022, updates installed on servers used as domain controllers. ![]() Note: Installation of updates released May 10, 2022, on client Windows devices and non-domain controller Windows Servers will not cause this issue. An issue has been found related to how the mapping of certificates to machine accounts is being handled by the domain controller. You might see authentication failures on the server or client for servicesĪfter installing updates released on your domain controllers, you might see machine certificate authentication failures on the server or client for services such as Network Policy Server (NPS), Routing and Remote access Service (RRAS), Radius, Extensible Authentication Protocol (EAP), and Protected Extensible Authentication Protocol (PEAP).
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