May 19, 2022—KB5015019 (OS Build 14393.5127) Out-of-band

Highlights

• Addresses a known issue that might prevent some services from authenticating machine accounts on clients or servers. This issue occurs after you install the May 10, 2022 update on domain controllers.       

Improvements

This non-security update includes quality improvements. Key changes include:

• Addresses a known issue that might cause authentication failures for some services on a server or client after you install the May 10, 2022 update on domain controllers. These services include Network Policy Server (NPS), Routing and Remote access Service (RRAS), Radius, Extensible Authentication Protocol (EAP), and Protected Extensible Authentication Protocol (PEAP). The issue affects how the domain controller manages the mapping of certificates to machine accounts. This issue only affects servers that are used as domain controllers and intermediary application servers which authenticate to domain controllers; it does not affect client Windows devices.

If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.  

Known issues in this update

Microsoft is not currently aware of any issues with this update.

How to get this update

Before installing this update

Microsoft strongly recommends you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU and applying Microsoft security updates. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

If you are using Windows Update, the latest SSU (KB5014026) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog. 

Install this update

Important Install this update on all domain controllers and intermediary application servers which authenticate to domain controllers. The intermediary application servers include Network Policy Servers (NPS), RADIUS, Certification Authority (CA), and web servers. 

Note After this update is installed, if you used any workaround or mitigations for this issue, they are no longer needed, and we recommend you remove them. This includes the removal of the registry key (CertificateMappingMethods = 0x1F) documented in the SChannel registry key section of KB5014754. There is no action needed on the client side to resolve this authentication issue.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 5015019.