Microsoft emergency updates fix Windows AD authentication issues (23rd May 2022)

Ref# AL2022_30 | Date: May 24th 2022


After installing Windows Upgrades given during the May 2022 Patch Tuesday on domain controllers, Microsoft has released an emergency update to address the Active Directory (AD) authentication difficulties. 


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) were seen after installing updates released on May 10, 2022, on your domain controllers. The out-of-band (OOB) Windows updates released are only available via the Microsoft Update Catalog. These emergency patches also correct an issue that prohibited users from installing apps from the Microsoft Store before. 

The following cumulative updates are available for installation on Domain Controllers: 

Microsoft also released standalone updates:  

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


The Guyana National CIRT recommends that users and administrations review this alert and apply it where necessary.  

PDF Download: Microsoft emergency updates fix Windows AD authentication issues.pdf


  • Gatlan, S. (2022, May 19). Microsoft emergency updates fix Windows AD authentication issues. Retrieved from  BleepingComputer.


  • Noureen, R. (2022, May 20). Microsoft Releases Out-Of-Band Patches to Fix Windows AD Authentication Issues. Retrieved from Petri IT Knowledgebase.