NAV2017 Web Client connection to NAV Server not work if trying to use Web client from other server

Hi,

About NAV2017 Web client functionality:

- I've installed NAV Server instance on server A where is also SQL Server.
- Web server components are installed on web server B.
- I have followed installation instructions from https://msdn.microsoft.com/en-us/library/jj551783(v=nav.90).aspx
- For instance, delegation is setup.

NAV 2017 web client is working from web server B but if I'll try to use web client from server A, I'll get message to browser: "A server error has occured and the content cannot be displayed. Refresh the page or open a new browser window."

Any idea, what might be a case in here?

Thanks in advance!

Here's an event log from web server B:

Error accessing Website Microsoft Dynamics NAV 2017 Web Client
Raw Url: /NAV_TEST/WebClient/list.aspx?spa=1&dc=0&inapp=false
Url: http://10.10.100.1:8080/NAV_TEST/WebClient/list.aspx?spa=1&dc=0&inapp=false
Type: Microsoft.Dynamics.Nav.Types.NavServerNotFoundException
Message: A server was not found at "net.tcp://testsql:7046/NAV_TEST/Service". Either the URL is incorrect or the server is currently not available.
StackTrace:
at Microsoft.Dynamics.Nav.Client.ConnectionEstablisher.ConfirmOpenConnectionRetry(ConnectFailedEventArgs connectFailedArgs, Exception exception)
at Microsoft.Dynamics.Nav.Client.ConnectionEstablisher.OpenConnection[TChannel](ConnectFailedEventArgs connectFailedArgs, ConnectionRequest connectionRequest, ConnectionOptions connectionOptions, SpnSetting spnSettingToTry, Boolean allowSpnSettingsSwap, UserSettings& userSettings)
at Microsoft.Dynamics.Nav.Client.ConnectionEstablisher.OpenConnection[TChannel](ConnectionRequest connectionRequest, ConnectionOptions connectionOptions, UserSettings& userSettings)
at Microsoft.Dynamics.Nav.Client.ServiceConnection.OpenConnection()
at Microsoft.Dynamics.Nav.Client.ServiceConnection.Initialize()
at Microsoft.Dynamics.Nav.Client.FormBuilder.BuilderSessionInitializer.OpenConnectionToServer()
at Microsoft.Dynamics.Nav.Client.FormBuilder.BuilderSessionInitializer.InitializeCore()
at Microsoft.Dynamics.Nav.Client.FormBuilder.BuilderSessionInitializer.Initialize()
at Microsoft.Dynamics.Framework.UI.UISession.Initialize()
at Microsoft.Dynamics.Nav.Client.Web.NavWebUISessionInitializer.InitializeCore(UISession session)
at Microsoft.Dynamics.Nav.WebClient.NavWebClientUISessionInitializer.InitializeCore(UISession session)
at Microsoft.Dynamics.Nav.Client.Web.NavWebUISessionInitializer.Initialize(UISession session)
at Microsoft.Dynamics.Framework.UI.Web.ShownFormTrackingUISessionInitializer.InitializeSessionAndTrackShownInitializationForms(UISession session)
at Microsoft.Dynamics.Framework.UI.Web.ShownFormTrackingUISessionInitializer.Initialize(UISession session)
at Microsoft.Dynamics.Framework.UI.Web.LogicalFormInitializer.InitializeSession(FormPropertyBag formBeingInitialized, ClientSession clientSession)
at Microsoft.Dynamics.Framework.UI.Web.LogicalFormInitializer.<>c__DisplayClass9_0.<Create>b__0()
at Microsoft.Dynamics.Framework.UI.LogicalOperationInvoker.InvokeAndHandleExceptions(Func`1 action, IExceptionHandler exceptionHandler)
Source: Microsoft.Dynamics.Nav.Client.ServiceConnection

---

Type: System.IO.IOException
Message: The read operation failed, see inner exception.
StackTrace:
at System.Net.Security.NegotiateStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.NegotiateStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.ServiceModel.Channels.StreamConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
Source: System

---

Type: System.ServiceModel.CommunicationException
Message: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '00:00:09.9350000'.
StackTrace:
at System.ServiceModel.Channels.SocketConnection.ReadCore(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout, Boolean closing)
at System.ServiceModel.Channels.SocketConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.DelegatingConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.ConnectionStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)
at System.Net.Security.NegotiateStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.NegotiateStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
Source: System.ServiceModel

---

Type: System.Net.Sockets.SocketException
Message: An existing connection was forcibly closed by the remote host
StackTrace:
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.ServiceModel.Channels.SocketConnection.ReadCore(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout, Boolean closing)
Source: System