It can be anything! An apex, subdomain, or even a URL.
Domain Name: msft.campaignhero.aiDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-21T19:29:31.116Z <<<
Domain Name: msft.campaignhero.ai
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-21T19:29:31.116Z <<<