It can be anything! An apex, subdomain, or even a URL.
Results for*.portal.azure.com.office.zurichairport.myshn.eu
www.*.portal.azure.com.office.zurichairport.myshn.euportal.azure.com.office.zurichairport.myshn.euazure.com.office.zurichairport.myshn.eucom.office.zurichairport.myshn.euoffice.zurichairport.myshn.euzurichairport.myshn.eumyshn.eueu