As <font><span style="background-color:rgba(255,255,255,0)">Herwin&#39;s suggestion, I modified my regular expression and it worked. WP8.1 clients can now be successfully authorized. Thanks for you guys&#39; help. Of course, adding unlang in authorization part is not good method as the accounting part don&#39;t use the same username that authorization part uses. </span></font><div><font><span style="background-color:rgba(255,255,255,0)">Maybe through the operation of ntdomain is better. And I don&#39;t want proxying while only deplo<span></span>ying a local host. I&#39;m newcomer in FR and don&#39;t know how to do it.</span></font></div>