How do I license FumeFX-Vray shader on our render farm?

[EncoreVFX01]

Hi there,
I am looking for information on how to license 40 render nodes that have the FumeFX-Vray shader for Maya. It doesn't appear obvious on the website.

I have placed the vray_FumeFX.dll file into the Maya2014\vray\vrayplugins folder.

I have a serial number to license 40 CPUs.

What is the next step to getting this licensed? Thank you.