Find Unused Dedicated VM's

[gpenunuri]

I'm trying to find a way to identify unused VM's.  We have a lot of contractors that come and go but the VDI stays assigned to the user and just sits unused.  I need a powercli script to identify those machines.  I tried to use vROPS but I didn't see a way to do it there either. 

I found this post below but not having much luck with this script.  It is just exporting blank files.  I fixed a few syntax issues but still nothing.  Any help would be much appreciated. 

https://communities.vmware.com/docs/DOC-36759#comment-43440

[RyanHardy]

Why not identify those VMs in combination with Active Directory? I'd hope those contractors get their accound disabled (or even deleted), so you could just let a script browse through all VMs and check if the assigned user is still active in AD.