Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-06-29T04:45:02","request-id":"7f4a70b9-5ea4-42a0-a99c-f1ac8695c4c1","client-request-id":"7f4a70b9-5ea4-42a0-a99c-f1ac8695c4c1"}}}"