Hello @Alberto-Rigamonti ,
The easy answer is 16 licenses L-CSR-1G-AX-3Y= , but before ordering them, I would look/ask your customer to look in Smart Software Licensing -> Inventory -> Licenses and verification for the L-CSR-1G-AX-3Y= the Available to use and In use columns in order to see if the client really needs all 16 licenses.
Regards, LG
*** Please Rate All Helpful Responses ***