Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-05-27T06:01:35","request-id":"bfca3d47-db5a-4cb1-9f9b-2465da32ed7b","client-request-id":"bfca3d47-db5a-4cb1-9f9b-2465da32ed7b"}}}"