Peer-to-peer authentication

Hi all!

We have Symantec Endpoint Protection v 14.2.4815 on our endpoints. I'm trying to configure peer-to-peer authentication on some servers, to prevent network connection from hosts without Symantec.

When I activate firewall policy with "peer-to-peer authentication" enabled on that server, it begins to block all traffic from hosts that are not excluded,  even if SEP is installed on them and host integrity check is passed. 

Am I doing something wrong, or peer-to-peer authentication works in different manner?

Thanks in advance.

Elvin