Dear Gurus!
I've tried to follow all the KB manuals, yet the instructions are not very clear as I'm not familiar at all with API terminology or protocols. Also Microsoft changed their way to register an application client https://docs.microsoft.com/en-us/onedrive/developer/rest-api/?view=odsp-graph-online (clicking on the links will redirect you to an azure portal) which makes it very difficult to understand what to do in order to get the datasource running.
Please, could you provide me with guidance in this regard.