PowerBI License with SQL Server Enterprise (SA)

I have a trial version of PowerBI Report Server running.   The PowerBI Report Server is NOT running on our core corporate SQL Server Enterprise Instance.  We have SA.  I know that running SQL Server Enterprise with SA entitles an organization to run PowerBI Report Server.  Since it is typical to run reporting services on another (isolated) instance I would expect the ability to setup such an instance would be covered with our existing Enterprise license.  Thoughts?

Thanks,

Bill