I would highly recommend that you contact Microsoft Support regarding any licensing issues to make sure you are in compliance with your site license terms.
As far as downgrading to windows 7, it is a wise decision. Trying to teach 13000 users how to navigate Windows 8 might give you nightmares. Windows 7 is widely accepted, I would use the Enterprise version instead of the PRO version for ease of licensing.But contact Microsoft Support for more information for sure.
Mark D. Albin, M.S. IT Master Services www.itmasterservice.com Office: (775) 229-4254
- Edited by Mark D. Albin Wednesday, July 24, 2013 3:46 AM edit