non TLS connection to symantec

We have Windows 2008 servers running SEP 12.1.6 build 6168 and we are seeing that they are making non TLS calls on port 443 to these folowing symantec magaged IP's

216.10.195.151

216.10.195.164

I have unchecked the Submissions settings thinking that was the feature making the calls but it still persists.

Any idea what the above IP's are for and how i can force a TLS connection?

thanks,

JT