Calling sap web service via kerberos does not work

Hello everybody,

I would like to call sap web service in vba . Authentication method is kerberos. I have implemented the following coding but it does not work.

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I get the following error message:

Runtime error -2147012711 (80072f99)

The "send" method for the "IWinHttpRequest" object failed


please please help me

kind regards
Viktor

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