THANKS!
I would love to see what you are doing.
We ended up solving the mystery 3 key combo with the following:
CTRL-ALT e
Which, by the way, we were SURE we had already tried! It could have just been human error, I'm just happy it is working now.
After watching a chromebook enroll itself, with the generous delays in place, it is clear that it may not actually be faster to enroll using this procedure. However, it is certainly less intense than running around a room full of chromebooks and furiously typing.
THANKS!
--Dan