To check if your Windows Logon Agent is accessible from the public network, enter the URL below in a web browser on the user's PC
https://Agent-FQDN:14294/healthcheck
Where "Agent-FQDN" is the external FQDN that you have given to your Windows Logon Agent
You will get a certificate warning, as the certificate used by the agent is a self-signed certificate. It is safe to ignore the certificate warning.