I had been using for months a third part driver to connect Knime to SharePoint.
Configuration required some time, but it worked perfectly.
In the last weeks it stopped working and I have the error
Execute failed: Cannot conclude ssl handshake. Cause: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target.
I had this problem before, but I imported the web site certificare in the java environment embedded in knime, and the problem was solved. Now the problem is back.
Any suggestion is really appreciated.