It can be anything! An apex, subdomain, or even a URL.
Results for*.microsoft-sbs-domains.com.office.o365-prod1.phoenixprod.myshn.eu
www.*.microsoft-sbs-domains.com.office.o365-prod1.phoenixprod.myshn.eumicrosoft-sbs-domains.com.office.o365-prod1.phoenixprod.myshn.eucom.office.o365-prod1.phoenixprod.myshn.euoffice.o365-prod1.phoenixprod.myshn.euo365-prod1.phoenixprod.myshn.euphoenixprod.myshn.eumyshn.eueu