Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-08-29T16:59:54","request-id":"e000960a-9f3d-4cec-a6ad-f73fd6c8d88e","client-request-id":"e000960a-9f3d-4cec-a6ad-f73fd6c8d88e"}}}"