SCCM2012 R2 Run a vbscript

I am trying to run a vbscript that maps network drives to my user collection. It works fine when i deploy it as an available deployments, but when i try to deploy it as required it never kicks off!!

Am I missing something here?

Can SCCM launch that vbscript automatically on clients machine ?

What log should I look at to verify the deployments?

THANKS FOR THE HELP :)