It can be anything! An apex, subdomain, or even a URL.
Results formicrosoftonline-p.net.office.skyhigh8732-onms.mcafee.myshn.eu
www.microsoftonline-p.net.office.skyhigh8732-onms.mcafee.myshn.eunet.office.skyhigh8732-onms.mcafee.myshn.euoffice.skyhigh8732-onms.mcafee.myshn.euskyhigh8732-onms.mcafee.myshn.eumcafee.myshn.eumyshn.eueu