symantec thin client License

we are running Windows Server Remote Desktop Services.

Below are the environment :

1. 1 x RDS Server
2. 10 x Thin Client

For proper licensing of Symantec End Point Protection, how many license does the client need to purchase :

1. 1 only as there is only 1 physical server.
2. 1 + 10, licensing is based on physical and RDS session.