Hi,
I’m sorry to tell you that NPS doesn’t support powershell on Server2008R2. If you really want to manage NPS via powershell, we think you can migrate the NPS Server to Windows Server 2012R2.
For detailed information, view the link below:
NPS Server Migration: Migrating the NPS Server
http://technet.microsoft.com/en-us/library/hh831346.aspx
Hope this helps.
Steven Lee
TechNet Community Support
