Считаю что это связано с прокси сервером потому как вижу так же такое сообщение:
ERROR: GetSccmConnectedServiceUrl Exception System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
172.21.21.179:3128~~ at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)~~ at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)~~ --- End of inner exception stack trace ---~~ at System.Net.HttpWebRequest.GetResponse()~~ at Microsoft.ConfigurationManager.DmpConnector.Connector.SCCMConnectorUtility.GetSccmConnectedServiceUrl(IWebProxy prx)