I have a strange problem with AutoLogon in our domain environment:

we have several machines that are configured for autologon, where the registry entries DefaultUsername, DefaultPassword, DefaultDomainName are all verified as having the correct data, and AutoAdminLogon is set to a value of '1'....

...but the machine does not autologon to that account, but instead shows the LOCK SCREEN for the account, and it is asking for email address instead of username, like it is not in a domain environment.

This occurs whether we run the Autologon.exe application, or manually configure the registry.

My guess is there is something else amiss, like a security setting, because everything I am reading says autologon itself is configured properly.

Has anyone experienced this? Do you know where I should start looking?

Windows 10 Enterprise, build 1709