V-Ray tier A and tier B

Hi,

I have two VMWare ESxi 5.1. Host A is 8 core CPU and Host B with two 4 core CPU. Host A has 1st AD Server and Exchange Server. Host B has 2nd AD Server and installed with Symantec Backup Exec to make backup for AD Server and Exchange Server but will not backup itself.

Can anyone tell me am I miss license?

Regards,

YM user