Azure Graph API 403 Error using Java tutorial

It appears that the Azure Graph API requires the URI connection type, instead of the HttpUrlConnection the java tutorial used. This works without the 403 error:

       try{
        // OAuth2 is required to access this API. For more information visit:
        // https://msdn.microsoft.com/en-us/office/office365/howto/common-app-authentication-tasks

        // Specify values for path parameters (shown as {...})
        URIBuilder builder = new URIBuilder("https://graph.windows.net/swisherint.onmicrosoft.com/users");
        // Specify values for the following required parameters
        builder.setParameter("api-version", "1.6");
        // Specify values for optional parameters, as needed
        // builder.setParameter("$filter", "startswith(displayName,'A')");
        URI uri = builder.build();
        HttpGet request = new HttpGet(uri);
        HttpResponse response = httpclient.execute(request);
        HttpEntity entity = response.getEntity();
        if (entity != null) {
            System.out.println(EntityUtils.toString(entity));
        }

        users =  EntityUtils.toString(entity);
    }
    catch (Exception e)
    {
        System.out.println(e.getMessage());
    }

Thanks for responding!

KB

According to the new offical document reference for AAD Graph API Get Users, it seems the api-version property in the code should be changed to 1.6. Please try it.

Meanwhile, there is an Error code reference list that you can find the description of the common error code 403 for AAD Graph API calling. And be checking whether your issue is belong to the one of the errors Authentication_Unauthorized, Authorization_RequestDenied & Directory_QuotaExceeded.

Any update, please feel free to let me know.