It can be anything! An apex, subdomain, or even a URL.

Results forwww.smpaccountexception-eastus.azurewebsites.net

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-08-06T20:46:20.936	2020-08-06T20:36:17	2021-08-06T20:36:17	smpaccountexceptionservice.dps.microsoft.com	smpaccountexception-eastus.azurewebsites.net	C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 5
2020-05-11T06:31:50.426	2020-05-11T06:21:46	2021-05-11T06:21:46	smpaccountexceptionservice.dps.microsoft.com	smpaccountexception-eastus.azurewebsites.net	C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 1
2018-08-01T13:42:34.404	2018-05-14T22:23:49	2020-05-14T22:23:49	smpaccountexceptionservice.dps.microsoft.com	smpaccountexception-eastus.azurewebsites.net	C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 2
2018-05-14T22:33:58.32	2018-05-14T22:23:49	2020-05-14T22:23:49	smpaccountexceptionservice.dps.microsoft.com	smpaccountexception-eastus.azurewebsites.net	C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 2