How do you generate Playfab Server SSL Certificate for WebGL client?

Could you please clarify that why you say “My WebGL client build needs the playfab server to be SSL certified.”? What does it mean? Do you host your web server on the PlayFab Multiplayer Server? Or do you mean when you test the Https request between the web page and the game server, you are noticed that there is no valid certificate?

We noticed you also posted a question in this thread -- SSL/WSS for multiplayer servers - Playfab Community. As this thread said, the “Upload Certificates” option applies for the Windows container. So, the answer of your first question is you can upload the certificates for your server using this option if you use the Windows container.

Besides, do you want to host the front-end web pages on the PlayFab Multiplayer Server persistently, and access them externally? If so, we would not suggest you host the WebGL web pages on the PlayFab Multiplayer Servers. For clarification, our multiplayer server hosting service is not designed to be used as a web server. Since the server hosts and IP addresses are constantly changing, it means you're unable to properly set up your own domain for the certificate. As this case said, our server hosting service is designed for hosting session-based games. It is not designed to run the persistent web service. If you want to host a web server, you can consider using the Azure App Service and refer to this documentation -- https://docs.microsoft.com/en-us/azure/app-service/configure-ssl-certificat to add the SSL certificates for your web app.