It can be anything! An apex, subdomain, or even a URL.
Results for*.outlook.com.office.yj-o365-onedrive.bt.myshn.eu
www.*.outlook.com.office.yj-o365-onedrive.bt.myshn.euoutlook.com.office.yj-o365-onedrive.bt.myshn.eucom.office.yj-o365-onedrive.bt.myshn.euoffice.yj-o365-onedrive.bt.myshn.euyj-o365-onedrive.bt.myshn.eubt.myshn.eumyshn.eueu