It can be anything! An apex, subdomain, or even a URL.
Results for*.activedirectory.windowsazure.com.portal.o365proxy.mvcpoc.myshn.eu
www.*.activedirectory.windowsazure.com.portal.o365proxy.mvcpoc.myshn.euactivedirectory.windowsazure.com.portal.o365proxy.mvcpoc.myshn.euwindowsazure.com.portal.o365proxy.mvcpoc.myshn.eucom.portal.o365proxy.mvcpoc.myshn.euportal.o365proxy.mvcpoc.myshn.euo365proxy.mvcpoc.myshn.eumvcpoc.myshn.eumyshn.eueu