Outlook Test E-mail autoconfiguration failure

Hi,
I try to setup autodisover xml file for my emails. I enabled mail client configuration in email settings. Also I added some changes in server templates mail client auto-configuration xml.

when I try to test e-mail auto configuration by outlook, there is failure and cannot connect to server and cannot access to xml file.
log shows GetLastError=12175; httpStatus=0;

Let me ask you help me to solve this issue.
Thanks