* Expects a 401 Unauthorized response.
     * @throws ServletException
     * @throws IOException
     * @throws CIFSException
     */
    @Test
    void testService_NtlmAuth_Failure() throws Exception {
        ntlmServlet.init(servletConfig);
        setupMocksForAuth();

        // Return null from NtlmSsp.authenticate to simulate initial NTLM handshake