KB5014987: Authentication failures occur after the May 10, 2022 update is installed on domain controllers running Windows Server 2008 R2 SP1

Summary

This update includes improvements for the following issue:

• 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.

Known issues in this update

We are currently not aware of any issues that affect this update.

How to get this update

Before installing this update

To install Windows Server 2008 R2 SP1 updates released on or after July 2019, you must have the following required updates installed.

• Install the SHA-2 code signing support updates:
  
  You must have the SHA-2 update (KB4474419) that is dated September 23, 2019 or a later SHA-2 update installed and then restart your device before you apply this update. For more information about SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.
  
  You must have installed the servicing stack update (SSU) (KB4490628) that is dated March 12, 2019. After update KB4490628 is installed, we recommend that you install the latest SSU update. For more information about the latest SSU update for Windows Server 2008 R2 SP1, see ADV990001 | Latest Servicing Stack Updates.

• Install the Extended Security Update (ESU):
  
  You must have installed the "Extended Security Updates (ESU) Licensing Preparation Package" (KB4538483) or the "Update for the Extended Security Updates (ESU) Licensing Preparation Package" (KB4575903). The ESU licensing preparation package will be offered to you from WSUS. To get the standalone package for ESU licensing preparation package, search for it in the Microsoft Update Catalog.
  
  You must have purchased the Extended Security Update (ESU) for on-premises versions of these operating systems and follow the procedures in KB4522133 to continue receiving security updates after extended support ends. Extended support for Windows Server 2008 R2 SP1 ended on January 14, 2020.

Monthly rollup updates are cumulative and include security and all quality updates. If you use Monthly rollup updates, you have to install both this update and the Monthly rollup released May 10, 2022 to receive the quality updates for May 2022. If you have already installed updates released May 10, 2022, you do not have to uninstall the affected update before you install any later updates including this update.

If you use Security-only updates for Windows Server, you only have to install this update for May 2022. Security-only updates are not cumulative, and you will also have to install all previous Security-only updates to be fully up to date.

Get 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 update KB5014987.

References

For more information about ESU and which editions are supported, see KB4497181.

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