It can be anything! An apex, subdomain, or even a URL.
Results for*.officeapps.live.com.euo365.eumso-201.euprod201.myshn.eu
www.*.officeapps.live.com.euo365.eumso-201.euprod201.myshn.euofficeapps.live.com.euo365.eumso-201.euprod201.myshn.eulive.com.euo365.eumso-201.euprod201.myshn.eucom.euo365.eumso-201.euprod201.myshn.eueuo365.eumso-201.euprod201.myshn.eueumso-201.euprod201.myshn.eueuprod201.myshn.eumyshn.eueu