It can be anything! An apex, subdomain, or even a URL.
Results for*.portal.office.com.mvc.rev365.shn2.myshn.eu
www.*.portal.office.com.mvc.rev365.shn2.myshn.euportal.office.com.mvc.rev365.shn2.myshn.euoffice.com.mvc.rev365.shn2.myshn.eucom.mvc.rev365.shn2.myshn.eumvc.rev365.shn2.myshn.eurev365.shn2.myshn.eushn2.myshn.eumyshn.eueu