It can be anything! An apex, subdomain, or even a URL.
Results for*.s.windows.microsoft.com.office.rp.skydemo.myshn.eu
www.*.s.windows.microsoft.com.office.rp.skydemo.myshn.eus.windows.microsoft.com.office.rp.skydemo.myshn.euwindows.microsoft.com.office.rp.skydemo.myshn.eumicrosoft.com.office.rp.skydemo.myshn.eucom.office.rp.skydemo.myshn.euoffice.rp.skydemo.myshn.eurp.skydemo.myshn.euskydemo.myshn.eumyshn.eueu