Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-09-19T23:50:35","request-id":"d2718a5f-e5ad-4757-b0dc-c8aa63f2e696","client-request-id":"d2718a5f-e5ad-4757-b0dc-c8aa63f2e696"}}}"