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;

panicoper · Answer 1 · 2019-09-02T16:20:51.550

4

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("host@host.com")
                );
        }
        throw new System.InvalidOperationException(string.Format("Could not find endpoint with name \'{0}\'.", endpointConfiguration));
    }

edited Sep 02 '19 at 16:20

answered Sep 02 '19 at 15:30

panicoper

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Please add code and data as text ([using code formatting](//stackoverflow.com/editing-help#code)), not images. Images: A) don't allow us to copy-&-paste the code/errors/data for testing; B) don't permit searching based on the code/error/data contents; and [many more reasons](//meta.stackoverflow.com/a/285557). In general, code/errors/data in text format >>>> code/errors/data as an image >> nothing. Images should only be used, in addition to text in code format, if having the image adds something significant that is not conveyed by just the text code/error/data. – Dharman Sep 02 '19 at 15:34

score 1 · Answer 2 · edited Mar 08 '19 at 19:41

1

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

edited Mar 08 '19 at 19:41

Necoras

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answered Mar 08 '19 at 18:55

naojamg

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Can you please read this: https://stackoverflow.com/help/how-to-answer and edit your answer? – RtmY Mar 08 '19 at 19:14
Can you explain why this workaround works, and maybe point me at some documentation about this ? We have this issue, but can't really use IP addresses. – MultiMat Feb 20 '20 at 14:01

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

2 Answers2