Disable "Windows Hello"

Thierry Vos 
They use their AzureAD joined email address & password to connect to the NAS share (which was shared for Public/Everyone on the NAS side). Tell user to choose the "Key" icon at login (Other logon options) and use those creds, and they're all fine.

Tried hacking the Registry for the Hello PIN, since MS disables your ability to change it when AzureAD joined...unless you pay for a certain Tier (or Add-on) within Azure itself.  No go...Registry hack didn't help.  So if you created/chose the option to use a Hello PIN when joining the workstation to Azure, you're stuck w/ the OPTION. 

This is Azure's habit, you pay for this, you pay for that, you subscribe for this, you subscribe for that, for more of that, for ability to do that, etc..    It's not my preference, over a local Domain w/ local Domain AD joined computers being the standard and long term (long term) cost savings.