For Power BI Service, the BI Connector licensing is a server-based (CPU core based) unlimited user license of BI Connector Server Edition. The number of CPU cores in the machine used for the On-Premise Gateway is considered. A minimum of 8 CPU cores must be licensed.

If you have an enterprise installation (10 or more CPU cores) of On-premise Gateway, then we recommend an enterprise license of BI Connector Server Edition which will offer you the flexibility to deploy BI Connector on all servers for all your users at an attractive cost.