It can be anything! An apex, subdomain, or even a URL.
Results for*.msecnd.net.office.test.proxyautomation.myshn.eu
www.*.msecnd.net.office.test.proxyautomation.myshn.eumsecnd.net.office.test.proxyautomation.myshn.eunet.office.test.proxyautomation.myshn.euoffice.test.proxyautomation.myshn.eutest.proxyautomation.myshn.euproxyautomation.myshn.eumyshn.eueu