Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-08-26T12:47:11","request-id":"7b4d5edb-eabf-48cd-83eb-bcf2d5631d9a","client-request-id":"7b4d5edb-eabf-48cd-83eb-bcf2d5631d9a"}}}"