For the HTTPS-based resolution mechanism, the 5GMSd Client is provisioned with a Service Access Information URL, for example dynamically via M8d or statically within the code of the 5GMSd-Aware Application. The Service Access Information URL contains an FQDN of a 5GMSd AF within the 5GMSd Application Provider domain, which acts as a request redirector.
The 5GMSd-Aware Application is provisioned (among other parameters) with a URL of the 5GMSd AF from which to aquire Service Access Information. The 5GMSd-Aware Application passes this URL to the 5GMSd Client upon start.
Based on information from the originating network (e.g. visible IP of the 5GMSd Client), the 5GMSd AF in the External DN creates an HTTPS redirection response. The 5GMSd AF looks up the according FQDN of the 5GMSd AF in the trusted DN and sends an HTTPS redirection response to the 5GMSd Client.
When the 5GMSd AF in the External DN does not offer 5GMS features, or if the 5GMS features are not provisioned it instead provides a response containing an HTTP error message.