@BlakeRichardson
Hi Blake,
The devices were all erased, ready for the new year.
This process was also done to fix an issue, due to accidentally creating a new certificate instead of renewing the old one, which had prevented those devices from checking in.
After erasing them, all of a particular grade was able to check in.
The only thing that's not working to my knowledge, is the user profile not installing.
I found this discussion, which suggests it may be a bug somewhere else:
https://community.meraki.com/t5/Mobile-Device-Management-Systems/Profile-Error-The-required-field-qu...
Regards,
Simon