Require lowercase letters

Use this policy setting to configure the use of lowercase letters in the PIN.

If you enable this policy setting, Windows requires the user to include at least one lowercase letter in their PIN.

If you disable this policy setting, Windows does not allow the user to include lowercase letters in their PIN.

If you do not configure this policy setting, Windows allows, but does not require, lowercase letters in the PIN.

Supported on: At least Windows 10 or Windows 10 RT

Registry HiveHKEY_LOCAL_MACHINE
Registry PathSOFTWARE\Policies\Microsoft\PassportForWork\PINComplexity
Value NameLowercaseLetters
Value TypeREG_DWORD
Enabled Value1
Disabled Value2

passport.admx

Administrative Templates (Computers)

Administrative Templates (Users)