It can be anything! An apex, subdomain, or even a URL.
Results for*.mspim.ext.azure.com.portal.o365proxy.mvcpoc.myshn.eu
www.*.mspim.ext.azure.com.portal.o365proxy.mvcpoc.myshn.eumspim.ext.azure.com.portal.o365proxy.mvcpoc.myshn.euext.azure.com.portal.o365proxy.mvcpoc.myshn.euazure.com.portal.o365proxy.mvcpoc.myshn.eucom.portal.o365proxy.mvcpoc.myshn.euportal.o365proxy.mvcpoc.myshn.euo365proxy.mvcpoc.myshn.eumvcpoc.myshn.eumyshn.eueu