The convenience PIN for Windows 11 must be disabled.

This policy controls whether a domain user can sign in using a convenience PIN to prevent enabling (Password Stuffer).

If the following registry value does not exist or is not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \Software\Policies\Microsoft\Windows\System

Value Name: AllowDomainPINLogon Value Type: REG_DWORD Value data: 0

Disable the convenience PIN sign-in.

To correct this, configure the policy value for Computer Configuration >> Administrative Templates >> System >> Logon >> Set "Turn on convenience PIN sign-in" to "Disabled".