Can you please clarify if you are indicating that you originally provisioned and managed your clients successfully with SCCM in an 802.1x environment and then later authentication broke? Or did you add the MSFT NPS in after originally configuring all of your vPro clients? Has this disjointed name space issue caused any other problems with your infrastructure?
Let me research this a bit more and see if there is anything that could be causing your error.
thank you for your replies. Microsoft Support just confirmed: Its a bug...
The behavior that you experience is a Bug in SCCM 2007. Regretfully the scenario where the NetBIOS domain name is not the same as
the leftmost part of the FQDN will lead to problems.
Thanks for the follow-up Marc!