July Cumulative Update for Windows Server 2016 (KB5004238) Printer Authentication

Chris Rossetti 21 Reputation points
2021-07-21T12:42:12.447+00:00

We have recently updated our Server 2016 Domain Controllers with (KB5004238) 2021-07 Cumulative Update for Windows Server 2016 for x64-based Systems and now our users are failing authentication via smart card when trying to scan to mail on Konica Printers. When the patch is removed from the domain controller, authentication is passed successfully. Has anyone else experienced a similar issue?

Windows Server 2016
Windows Server 2016
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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  1. Carolyn Bounds 1 Reputation point
    2021-07-22T21:03:18.803+00:00

    We're having the same issue except with HP Multi-Function printers. After installing KB5004238 on our windows 2016 domain controllers smart card authentication started failing on our HP MFPs. Removing the patch restored functionality. The error message on the printer is

    Kerberos code -1765328370

    That code indicates that the KDC has no support for encryption type. We're planning to upgrade our MFP firmware and test again over the weekend.


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