A call to SSPI Failed - The message received was unexpected or badly formatted

Question

Hi

My company is developing a standard Win32 C# program, which "of cause" works as it should.
It installs and run fin on our internal manilla Windows 2022 servers, but when creating a Azure VM with Server 2022 image (Not "for Azure image", that normal one), when the client.exe starts and tries to connect to the server it gives the following error:

The connection is s SSL1.2 using a RSA4096/SHA512 certificate.

Can someone help with what is different on the Azure install than a normel "CD installed" Windows Server 2022

Regards Lars Mortensen

Answer 1

Hi,

There is another thread that discuss SSPI issues:
https://learn.microsoft.com/en-us/answers/questions/571511/ssrs-a-call-to-sspi-failed-see-inner-exceptionmail.html

Maybe TLS 1.2 with RSA4096/SHA512 is not supported/configured on Azure machine.

Hope this helps!

Answer 2

Hi LarsHetnerMllerMortensen-4667,

You may be running into enhanced security on the Azure installed Server 2022. If InTune is being used, it's likely that your security certificate is not working as you would expect.

There are other differences as outlined in this document:

https://learn.microsoft.com/en-us/windows-server/get-started/editions-comparison-windows-server-2022

I hope this answers your question.

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Answer 3

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;