The external server hosting is a part of our Legacy Multiplayer Server service that has been deprecated. Please check this blog for more information - PlayFab sunsetting legacy Multiplayer Servers for more information.
Currently, we only support the multiplayer server hosting service based on Azure VM. To get started with the currently supported Multiplayer Servers, please view the series of documentations here - Servers - PlayFab | Microsoft Docs and check our sample repository - GitHub - PlayFab/MpsSamples: Samples that show how to use PlayFab's Gameserver SDK for Multiplayer Servers.
If you want to use other PlayFab Multiplayer Services, such as PlayFab MatchMaking with external servers together, there is no official sample now, you can try to implement the integration on your own.
9 People are following this question.