Scenario File to Sharepoint webservice

Hi,

We are on a PI 7.31 single stack installation and are in the process of developing a File to Sharepoint webservice scenario.

When we take the output message of the mapping, and post this via SOAP UI to the webservice, everything works fine.

When we post the message via PI, it gives following error:

Exception caught by adapter framework: SOAP: response message contains an error XIAdapter/HTTP/ADAPTER.HTTP_EXCEPTION - HTTP 401 Unauthorized

We tried basic authentication/kerberos authentication. The error persists.

Does anyone have the same experience ? Any solution ? I don't know if this has something to do with the Sharepoint authentication methods because other service calls don't give this problem.

Thanks,

Jan