NEWS

Microsoft emergency updates fix Windows AD authentication issues

Posted on May 20, 2022 by bis_admin

Microsoft has released emergency out-of-band (OOB) updates to address Active Directory (AD) authentication issues after installing Windows Updates issued during the May 2022 Patch Tuesday on domain controllers.

The company has been working on a fix for this known issue causing authentication failures for some Windows services since May 12.

“After installing updates released May 10, 2022 on your domain controllers, you might see authentication failures on the server or client for services such as Network Policy Server (NPS), Routing and Remote access Service (RRAS), Radius, Extensible Authentication Protocol (EAP), and Protected Extensible Authentication Protocol (PEAP),” Microsoft explained.

“An issue has been found related to how the mapping of certificates to machine accounts is being handled by the domain controller.”

The OOB Windows updates released today are available only via the Microsoft Update Catalog and will not be offered through Windows Update.

The company released the following cumulative updates for installation on Domain Controllers (no action needed on the client-side):

Microsoft also released standalone updates:

These updates can be manually imported into Windows Server Update Services (WSUS) and Microsoft Endpoint Configuration Manager.

“If you are using security only updates for these versions of Windows Server, you only need to install these updates for the month of May,” Microsoft added.

“If you are using Monthly Rollup updates, you will need to install both the standalone update listed above, and the Monthly rollups released May 10, 2022.”

Original Posts: Microsoft emergency updates fix Windows AD authentication issues