thank you for your help.
here is the logs.
Error accessing Website Microsoft Dynamics NAV 2016 Web Client
URL: ygtest.cloudapp.net/.../SignIn.aspx
Type: Microsoft.Dynamics.Nav.Types.Exceptions.NavAuthenticationException
Message: You cannot sign in due to a technical issue. Contact your system administrator.
StackTrace:
at Microsoft.Dynamics.Nav.Client.FaultExceptionHelperClass.ConvertException(Exception ex, NavClientCredentialType credentialType)
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.Web.SimpleServerOperation.SimpleServerOperationConnectionEstablisher.OpenConnection[TChannel](ConnectionRequest connectionRequest, ConnectionOptions connectionOptions, UserSettings& userSettings)
at Microsoft.Dynamics.Nav.Client.Web.SimpleServerOperation.Execute[TResult,TChannel](ConnectionOptions serverConnectionOptions, Func`2 operation, Func`2 localExceptionHandler)
Source: Microsoft.Dynamics.Nav.Client.ServiceConnection----------------------------------
Type: System.ServiceModel.Security.MessageSecurityException
Message: An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail.
StackTrace:
Server stack trace:
at System.ServiceModel.Channels.SecurityChannelFactory`1.SecurityRequestChannel.ProcessReply(Message reply, SecurityProtocolCorrelationState correlationState, TimeSpan timeout)
at System.ServiceModel.Channels.SecurityChannelFactory`1.SecurityRequestChannel.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Security.SecuritySessionSecurityTokenProvider.DoOperation(SecuritySessionOperation operation, EndpointAddress target, Uri via, SecurityToken currentToken, TimeSpan timeout)
at System.ServiceModel.Security.SecuritySessionSecurityTokenProvider.GetTokenCore(TimeSpan timeout)
at System.IdentityModel.Selectors.SecurityTokenProvider.GetToken(TimeSpan timeout)
at System.ServiceModel.Security.SecuritySessionClientSettings`1.ClientSecuritySessionChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ReliableChannelBinder`1.ChannelSynchronizer.SyncWaiter.TryGetChannel()
at System.ServiceModel.Channels.ReliableChannelBinder`1.ChannelSynchronizer.SyncWaiter.TryWait(TChannel& channel)
at System.ServiceModel.Channels.ReliableChannelBinder`1.ChannelSynchronizer.TryGetChannel(Boolean canGetChannel, Boolean canCauseFault, TimeSpan timeout, MaskingMode maskingMode, TChannel& channel)
at System.ServiceModel.Channels.ReliableChannelBinder`1.Send(Message message, TimeSpan timeout, MaskingMode maskingMode)
at System.ServiceModel.Channels.SendReceiveReliableRequestor.OnRequest(Message request, TimeSpan timeout, Boolean last)
at System.ServiceModel.Channels.ReliableRequestor.Request(TimeSpan timeout)
at System.ServiceModel.Channels.ClientReliableSession.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ClientReliableDuplexSessionChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at Microsoft.Dynamics.Nav.Types.Channels.ChunkingDuplexSessionChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at System.ServiceModel.ICommunicationObject.Open()
at Microsoft.Dynamics.Nav.Client.ConnectionEstablisher.CallOpenConnection(IAsyncNavService server, ConnectionRequest connectionRequest)
at Microsoft.Dynamics.Nav.Client.ConnectionEstablisher.OpenConnection[TChannel](ConnectFailedEventArgs connectFailedArgs, ConnectionRequest connectionRequest, ConnectionOptions connectionOptions, SpnSetting spnSettingToTry, Boolean allowSpnSettingsSwap, UserSettings& userSettings)
Source: mscorlib----------------------------------
Type: System.ServiceModel.FaultException
Message: You cannot sign in due to a technical issue. Contact your system administrator.
StackTrace:
Source: