Microsoft Releases OOB Updates to Fix Domain Controller Authentication Error After Patch Tuesday

After the latest May Patch Tuesday updates (Windows 11, Windows 10) , Microsoft confirmed that the update was causing domain controller authentication failures. Later, CISA also asked administrators to temporarily skip Patch Tuesday. Issues were occurring due to a certificate mapping error, and the company provided a workaround.

Microsoft released several out-of-band (OOB) updates today that address this issue. Advisory says:

After installing the May 10, 2022 updates on your domain controllers, you may experience server or client authentication errors.

[…]

Decision. This issue was resolved in unscheduled updates released on May 19, 2022 for installation on domain controllers in your environment. No action is required on the client side to resolve this authentication issue. If you have used any workarounds or workarounds for this issue, they are no longer needed and we recommend that you remove them.

You can download the required updates from the Microsoft website . Links to the update catalog are provided below:

Operating Systems KB Microsoft Update Catalog
Windows Server 2022

KB5015013

Download
Windows Server 20H2

KB5015020

Download
Windows Server 2019

KB5015018

Download
Windows Server 2016

KB5015019

Download

You can find the official guidelines here .

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