It can be anything! An apex, subdomain, or even a URL.
Results for*.security.live.com.mvision.yj-o365-and-onedrive.bt.myshn.eu
www.*.security.live.com.mvision.yj-o365-and-onedrive.bt.myshn.eusecurity.live.com.mvision.yj-o365-and-onedrive.bt.myshn.eulive.com.mvision.yj-o365-and-onedrive.bt.myshn.eucom.mvision.yj-o365-and-onedrive.bt.myshn.eumvision.yj-o365-and-onedrive.bt.myshn.euyj-o365-and-onedrive.bt.myshn.eubt.myshn.eumyshn.eueu