Entrypoint refers to the identity of a site in a multisite deployment where VPN needs to be installed. This is required in ...

Entrypoint refers to the identity of a site in a multisite deployment where VPN needs to be installed. This is required in a scenario where DirectAccess with multisite is already deployed and a user wants to additionally deploy VPN. If entrypoint is not specified then the entrypoint to which the server on which the cmdlet is executed belongs is used. The server could also be represented using the ComputerName parameter.
If both entrypoint and computername are specified and the ComputerName does not belong to the site represented by the entrypoint then the entrypoint takes precedence and VPN is deployed at the site indicated by it.
Note that in a multisite deployment case VPN can only be installed one site at a time.