Assistance in deciding the no. of licenses.

Hello Team,

Here's is our whole environment setup

Virtual :

4 virtual hosts (Vcenter Server) with 20 virtual machines.

Attached the settings of one of the virtual host(it's the same for other 3 hosts too).

Note :Please tell me how you decided on the licensing for V-ray edition.

Applications running on VM's

1)Exchange - 1

2)Active Directory - 3 

3)SQL Server -1

4)File Server ( windows OS )

5)Others VM's are running on windows Server OS

Physical Environment : 

Total 5 Servers

1) Active Directory -3

2)SQL Server -1

3)File Serve - (Windows OS)

Could you suggest a licensing solution for the above scenario.

Thanks in advance