Some May 2022 Microsoft Security Updates Are Leading to Authentication Failures. Microsoft reported : “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),”.Continue reading “Microsoft May Patch Updates Cause Windows AD Authentication Errors”