Hi,
I had installed On premise gateway server application & configured the proxy settings in EnterpriseGatewayConfigurator.exe.config, Microsoft.PowerBI.EnterpriseGateway.exe.config & Microsoft.Mashup.Container.NetFX45.exe.config as per the documentation. Still unable to complete the configuration as i'm getting the error @ the first configuration screen itself.

Also found the below error in Gateway configurator log
EnterpriseGatewayConfigurator.exe Error: 0 : Exception: Microsoft.PowerBI.DataMovement.GatewayCommon.EmailDiscoveryServiceException: Network request returned unexpected error. ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> 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 51.116.144.128:443
at System.Net.Sockets.Socket.InternalEndConnect(IAsyncResult asyncResult)
at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
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.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context)
at System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar)
--- End of inner exception stack trace ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.PowerBI.DataMovement.GatewayCommon.ConfiguratorClientExtensions.<DiscoverEmailProperties>d__8.MoveNext()
--- End of inner exception stack trace ---
Appreciate help on the same.
Thanks.