Backup Exec 2014 SAN Licensing

Hey guys! How are you? 

I need help with another project please. In this oportunity i need make an scenario with 3 Windows Server, a tape library and a SAN/iSCSI Netapp's Storage. All the server will be connect to the SAN via FC HBA or iSCSI and will be backup by SAN (Off-host).

What licenses do i need? i suppose 1 Backup Exec Server + 3 AWS but i don't know how the SAN connection impacts in the licensing.

Can you help me pls¿?

Thanks!