I have recently purchased a few Chromebooks. We have both Acer and Samsung. These instructions worked on both.
When joining a Chromebook to our local email domain for management the process is fairly straightforward. You wait for the sign in screen, but instead of signing in you press Ctrl-E. This then brings up another sign in screen, and I have entered the admin email and password, then the system says enrolled and the sign in screen actually comes up, but now says that this device is managed by my email domain.
Sometimes during this process the device doesn't enroll properly. The only way to fix that is to factory reset the device and try again.
I had to call support to get this information, but since it worked on both types of devices I am blogging it for my future reference!
With the device turned off completely follow these instructions:
Esc - Refresh - Power button The refresh button is F3 on both of the devices, but is usually represented by a circular arrow.
Once the device comes up to the developer mode press:
Ctrl - D and the Enter key.
This will send the device into develop reset mode. It will probably take a few minutes to wipe the device. It will restart a few times. When it is done it will go right back to the initial process as if you just turned it on for the first time.
The device can now be enrolled in the domain for management.
The Acer device needed the developer mode turned off, which is just the above process again. The Samsung didn't need that step.
Hopefully this helps others, or at least is for my reference.