My aim is to connect an O365 SP-online list - like Calendar or Contacts to Outlook either OWA or Windows.
it needs to happen via an API cal - like REST or ideally graph.api
It is familiar to me to connect by opening the SPO list - -switch to old design and press in the UI a button to connect to Outlook.
As I am working with "hidden" lists there is no way a user can connect via UI
Open to ideas
