I used this process to go from 2003 to 2016 and the main issue i'm having right now is my Domain controllers are saying:
The Key Distribution Center (KDC) cannot find a suitable certificate to use for smart card logons, or the KDC certificate could not be verified. Smart card logon may not function correctly if this problem is not resolved. To correct this problem, either verify the existing KDC certificate using certutil.exe or enroll for a new KDC certificate.
We're only really generating machine certificates for IAS authentication and from a member server i was able to request a new cert.
But my Domain controllers all have the error and on certutil -verify i get:
The revocation function was unable to check revocation because the revocation server was offline. 0x80092013 (-2146885613)
Any help is appreciated!