Hello Dave,
Each Developer license includes one Server license by default. We are providing the following volume licensing discounts:
3 to 4 licenses - 10% discount
5 to 9 licenses - 20% discount
10 to 19 licenses - 30% discount
20 or more licenses - 40% discount
A server license will be required for each production report server license (running reporting services).
Best Regards,
Nevron Support Team