When accessing live.com email web page(mail.live.com), it will access go.trouter.io url that is blocked by our local firewall and proxy

When accessing live.com email web page(mail.live.com), it will access go.trouter.io url that is blocked by our local firewall and proxy.

What is required to prevent live.com from accessing go.trouter.io within our environment?

Here is the request path for this issue from httpwatch and verified https://go.trouter.io access referrer from mail.live.com.

+ 0.261                  47                           0.653     3093       37967    GET        200         html                https://bay170.mail.live.com/default.aspx?id=64855

+ 8.067                  2                              0.067     469         9061       GET        200         javascript                https://secure.wlxrs.com/_D/F$Live.SiteContent.Messenger/6.1.2090/loader.cxp.js

+ 8.241                  1                              0.175     469         32799    GET        200         javascript                https://az351254.vo.msecnd.net/2-1-1331/assets/javascript/outlook-package.min.js

{c.open(d||"https://go.trouter.io/v1/a")