System.Net.WebException: The request failed with HTTP status 404: Not Found.~~ at Microsoft.UpdateServices.Administration.AdminProxy.CreateUpdateServer(Object[] args)~~ at Microsoft.SystemsManagementServer.WSUS.WSUSServer.ConnectToWSUSServer(String ServerName, Boolean UseSSL, Int32 PortNumber) Overview: I was recently working with a customer who was receiving a HTTP 404 error in the WCM.log. Confirmed the following ports are open (80,443,135,445,8530,8531) WSUS sites are accessible via URL HTTP Boundaries and Boundary groups for content and site assignment are configured correctly for DEV domain. Distribution Point and Management Point roles are fully functionality WSUS on Server2.dev.local manually synchronized from the Internet Remote Registry and remote WMI tested with success. Lab Environment Expected behaviour: In my lab environment I have two forests/domains “Contoso.local” and “DEV20.local”; untrusted; Windows firewall ON with default values. I have added the Site S...