Just ran into this.
Very stuck at the moment, since no local users available.
Replicated on a VM. Wondering if its a combination of our AAD settings and latest update.
Any tips on fixing without any local users created?
EDIT: Managed to boot to safe mode and users are back...
EDIT2: In safe mode can login with AAD user. Created a local admin account. Reboot and see login screen for "Other", and can login with AAD user again.
However, then disabled local admin again, reboot. No login available. Will try again and try to rebind to AAD.
EDIT3: Enabled local admin, trying to unbind from AAD... but wont take/allow local admin. Looks like only allowing MS/email.
If I delete device from AAD, will it unbind from Machine? or would rebind auto on reboot and add again to AAD?