How to register for Android Zero-touch?

hello and welcome!

Only resellers are able to register devices in Android zero touch. If you aren't one, my advice is to look for one that can help you with that. The full list of resellers authorized to do this is listed here: Android Business Device Solutions Directory - Android Enterprise - Resellers

Knox provides options to upload devices yourself, but thats only one at a time. Android zero touch does not offer such a solution at this point. 

Its probably not the answer you were looking for but still hope this helps!

Michel