Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-04-22T16:51:15","request-id":"ca26d608-2ddc-4c62-a424-26c8a742e39a","client-request-id":"ca26d608-2ddc-4c62-a424-26c8a742e39a"}}}"