# Microsoft Entra ID must, for password-based authentication, verify when users create or update passwords that the passwords are not found on the list of commonly used, expected, or compromised passwords

Microsoft Entra password protection enforces a custom banned password list that holds entries. (DISA Microsoft Entra ID STIG, V-270475, CAT II).

Source: https://maester.dev/docs/tests/DISA.V-270475

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<div class="test-byline"><div class="test-byline-avatars"><a class="test-byline-avatar test-byline-avatar--author" href="/contributors/merill" title="Merill Fernando · Original author"><img src="https://github.com/merill.png" alt="Merill Fernando" width="28" height="28" loading="lazy" decoding="async" /></a></div><div class="test-byline-meta"><span class="test-byline-text">Contributed by <a href="/contributors/merill">Merill Fernando</a></span><a class="test-byline-link" href="/contributors">All contributors →</a></div></div>

<p class="test-part">Part of <a href="/docs/tests/disa">DISA</a> · Entra ID · Password protection · <a href="/docs/tests">All checks</a></p>

```powershell title="Run this check"
Invoke-Maester -TestId DISA.V-270475
```

## Overview

Microsoft Entra password protection enforces a custom banned password list that holds entries. (DISA Microsoft Entra ID STIG, V-270475, CAT II).

Users pick passwords from what is around them: the organization's name, products and places. A custom banned password list stops those words, on top of the global list Microsoft maintains.

DISA's check requires **Enforce custom list** set to **Yes** and a list that is not empty. This test runs [CIS.M365.5.2.3.2](https://maester.dev/docs/tests/CIS.M365.5.2.3.2), which checks both.

#### Remediation action

1. In the [Microsoft Entra admin center](https://entra.microsoft.com), go to **Entra ID** > **[Authentication methods](https://entra.microsoft.com/#view/Microsoft_AAD_IAM/AuthenticationMethodsMenuBlade/~/PasswordProtection)** > **Password protection**.
2. Set **Enforce custom list** to **Yes** and add terms specific to your organization to **Custom banned password list**.
3. Select **Save**.

#### Related links

* [DISA Microsoft Entra ID STIG: V-270475](https://cyber.trackr.live/stig/Entra_ID/1/2/V-270475)
* [Eliminate bad passwords using Microsoft Entra Password Protection](https://learn.microsoft.com/entra/identity/authentication/concept-password-ban-bad)

## Details

<details>
<summary>Every attribute of this check</summary>

| Field | Value |
| --- | --- |
| Test ID | DISA.V-270475 |
| Severity | Medium |
| Suite | DISA |
| Product | Entra ID |
| Feature | Password protection |
| Area | Authentication |
| Resource type | Tenant |
| User impact | Low |
| Implementation cost | Low |
| MITRE ATT&CK | T1110.003 Password Spraying |
| Supports benchmark | DISA Microsoft Entra ID STIG (version V1R2), requirement V-270475 |
| Supports controls | disa-stig-entra-id:V-270475, nist-800-53-r5:IA-5(1) |
| PowerShell test | [Test-MtDisaEntraBannedPasswordList](https://github.com/maester365/maester/blob/main/tests/disa/Test.DISA.V-270475.ps1) |
| Services | Graph |
| Compatible licenses | AAD_PREMIUM |

</details>

## Source

- Test: [`tests/disa/Test.DISA.V-270475.ps1`](https://github.com/maester365/maester/blob/main/tests/disa/Test.DISA.V-270475.ps1)
- Documentation: [`tests/disa/Test.DISA.V-270475.md`](https://github.com/maester365/maester/blob/main/tests/disa/Test.DISA.V-270475.md)