Policy
Configure minimum PIN length for startup
Microsoft Windows
Policy overview
Key metadata and intent for this policy.
Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016
This policy setting allows you to configure a minimum length for a Trusted Platform Module (TPM) startup PIN. This policy setting is applied when you turn on BitLocker. The startup PIN must have a minimum length of 4 digits and can have a maximum length of 20 digits. If you enable this policy setting, you can require a minimum number of digits to be used when setting the startup PIN. If you disable or do not configure this policy setting, users can configure a startup PIN of any length between 6 and 20 digits. NOTE: If minimum PIN length is set below 6 digits, Windows will attempt to update the TPM 2.0 lockout period to be greater than the default when a PIN is changed. If successful, Windows will only reset the TPM lockout period back to default if the TPM is reset.
Registry values
How enabled and disabled states update the registry.
No explicit registry values are set for enabled or disabled states.
Policy elements
Inputs and configuration options exposed by this policy.
| Scope | Element | Type | Registry mapping | Constraints & behavior | Copy |
|---|---|---|---|---|---|
| Computer | Minimum characters: ID MinPINLength | decimal | Path Software\Policies\Microsoft\FVE Value name MinimumPIN Type REG_DWORD | Range: 4 to 20 |