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||Download|
|Windows Server 20H2||Download|
|Windows Server 2019||Download|
|Windows Server 2016||Download|
You can find the official guidelines here .