It can be anything! An apex, subdomain, or even a URL.
Results forhe-sipfed.enterprise-p02.ic3-interop-hybridedge.chinaeast3-gallatin.cosmic.partner.outlook.cn
www.he-sipfed.enterprise-p02.ic3-interop-hybridedge.chinaeast3-gallatin.cosmic.partner.outlook.cnenterprise-p02.ic3-interop-hybridedge.chinaeast3-gallatin.cosmic.partner.outlook.cnic3-interop-hybridedge.chinaeast3-gallatin.cosmic.partner.outlook.cnchinaeast3-gallatin.cosmic.partner.outlook.cncosmic.partner.outlook.cnpartner.outlook.cnoutlook.cncn