We have late 2012 mac minis in our classrooms and conference rooms
running Yosemite and Windows 7. All were originally imaged using
winclone pro. Currently I'm trying to replace the old platter drives
with solid state drives running Sierra and Window...
Any update? We are experiencing the same issue when using a unique ID
specifically created for our Apple VPP account. I've contacted our Apple
Edu rep and waiting to hear back.