It can be anything! An apex, subdomain, or even a URL.
Results for*.officeredir.microsoft.com.office.prod.link4tu.myshn.eu
www.*.officeredir.microsoft.com.office.prod.link4tu.myshn.euofficeredir.microsoft.com.office.prod.link4tu.myshn.eumicrosoft.com.office.prod.link4tu.myshn.eucom.office.prod.link4tu.myshn.euoffice.prod.link4tu.myshn.euprod.link4tu.myshn.eulink4tu.myshn.eumyshn.eueu