It can be anything! An apex, subdomain, or even a URL.
Results forwww.activedirectory.windowsazure.com.office.lucleiasc.mcafee.myshn.eu
activedirectory.windowsazure.com.office.lucleiasc.mcafee.myshn.euwindowsazure.com.office.lucleiasc.mcafee.myshn.eucom.office.lucleiasc.mcafee.myshn.euoffice.lucleiasc.mcafee.myshn.eulucleiasc.mcafee.myshn.eumcafee.myshn.eumyshn.eueu