Backup Exec 2012 Agent Licensing

Hi Symantec,

I’ve an licensing requirement related enquiry before purchasing Backup Exec 2012 licenses. Currently, we have a client with 4 servers with the following roles below. I'm confused on the licenses required to purchase to fulfill the agent licensing requirement by Symantec. Kindly help.

Server 1 – Active Directory

Server 2 – Active Directory, SQL & Backup Exec Media Server

Server 3 – SQL

Server 4 – Hyper-V

As what I can think of is, I need 2 x Agent for App & DB (for 1 & 2 & 3), 1 x Hyper-V Agent (for 4). Since Server 2 is BEMS, is BE server license is sufficient?