It can be anything! An apex, subdomain, or even a URL.
Results forwindows.microsoft.com.office.office-365-eu-lab.cloudexperte.myshn.eu
www.windows.microsoft.com.office.office-365-eu-lab.cloudexperte.myshn.eumicrosoft.com.office.office-365-eu-lab.cloudexperte.myshn.eucom.office.office-365-eu-lab.cloudexperte.myshn.euoffice.office-365-eu-lab.cloudexperte.myshn.euoffice-365-eu-lab.cloudexperte.myshn.eucloudexperte.myshn.eumyshn.eueu