Pins are Bad Mkay...

One thing I still see constantly in business environments?
People treating PIN logins like they’re “just a shorter password.”

They’re not.
And if you haven’t properly planned or governed Windows Hello / PIN usage…
…you may be introducing authentication methods into your environment you never fully intended to support.

I’ve walked into environments where:
- Password policies were strict
- MFA was enforced
- Security awareness training was nonstop

…but users could still bypass all of that with:

“Just set a quick PIN.”

Now to be clear:
Modern Windows Hello for Business can be VERY secure when properly implemented.

But “enabled by default” and “properly implemented” are not the same thing.

If your organization does NOT want domain users signing in with PINs, here’s one setting worth reviewing:

- Open Registry Editor as admin
- Go to:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System
- Create or modify the DWORD (32-bit) value:
- AllowDomainPINLogon
- Set it to: 0

What this does:
- Disables PIN sign-in for domain users.

What this does NOT do:
- It does not remove passwords, MFA, or other authentication methods.
- It specifically prevents PIN-based domain logons.

Unforeseen effects of disabling:
- Biometric logins may not work

This is especially useful for:
- Highly controlled environments
- Organizations not using Windows Hello for Business
- Shared systems
- Environments standardizing authentication methods

Authentication sprawl is still sprawl.
Just because Windows offers a feature… doesn’t mean your environment needs it enabled. or at least in the default manner...

(if you want a free guide of other hardening tips like this or a better/automated method of hardening configuration settings than Intune alone, pm me 😉 )

Bonus finding from my Senteon tool: https://docs.senteon.co/windows-hello-not-working

Alden Wilson thanks for the kind words my doot! 🪿