Get an error when consuming a WCF server from .Net Core 2.1 but it's fine on .NET

Question

I have a WCF service (AIF) on Microsoft Dynamics AX

I can call it without any problem using .NET 4.6.1. However, when I run the same exact code using .NET Core I get an error which states

A call to SSPI failed The target principal name is incorrect

There are many alike questions out there about this error but the solutions does not fix my problem.

    var service = new MarketplaceGetItemsDataServiceClient();
    service.ClientCredentials.Windows.ClientCredential.UserName = "UserName";
    service.ClientCredentials.Windows.ClientCredential.Password = "P@ssword";
    service.ClientCredentials.Windows.ClientCredential.Domain = "Domain";
    var result = service.GetItemsDataAsync(new CallContext(), new SearchOptionsDC() { VendorId = "0000" }).Result;

Answer 1

Change the DNS and replace it with the IP in the WCF tool.

Answer 2

In Connected Services\MyService\Rference.cs file find the method GetEndpointAddress() and add the UpnEndpointIdentity with your identity account.

private static System.ServiceModel.EndpointAddress GetEndpointAddress(EndpointConfiguration endpointConfiguration)
    {
        if ((endpointConfiguration == EndpointConfiguration.NetTcpBinding_MyService))
        {
            return new System.ServiceModel.EndpointAddress(
                new System.Uri(@"net.tcp://190.188.1.2:8201/DynamicsAx/Services/MyService"), 
                new System.ServiceModel.UpnEndpointIdentity("[email protected]")
                );
        }
        throw new System.InvalidOperationException(string.Format("Could not find endpoint with name \'{0}\'.", endpointConfiguration));
    }