# GPOs without domain computers count should be retrievable

GPOs without domain computers count should be retrievable. A Maester check for Active Directory, Group Policy.

Source: https://maester.dev/docs/tests/AD-GPOREP-06

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<div class="test-byline"><div class="test-byline-avatars"><a class="test-byline-avatar test-byline-avatar--author" href="/contributors/soulemike" title="Michael Soule · Original author"><img src="https://github.com/soulemike.png" alt="Michael Soule" 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/soulemike">Michael Soule</a></span><a class="test-byline-link" href="/contributors">All contributors →</a></div></div>

<p class="test-part">Part of <a href="/docs/tests/ad">Active Directory</a> · Active Directory · Group Policy · <a href="/docs/tests">All checks</a></p>

```powershell title="Run this check"
Invoke-Maester -TestId AD-GPOREP-06
```

## Overview

#### Control Type

**Detective**

#### Test-MtAdGpoNoDomainComputersCount

 Counts GPO reports that do not include Domain Computers.

#### Why This Test Matters
- Detective control: identifies GPO reports missing Domain Computers which could impact scope or applicability.

#### Security Recommendation
- Verify whether Domain Computers should be included and adjust GpoReports as needed to reflect accurate targeting.

#### How the Test Works
- Reads GPO state, counts the GPO reports without an access-allowed entry for Domain Computers (HasDomainComputers is false), and reports counts and samples.
- The default GPO permissions have no Domain Computers entry, so the test only fails for GPOs that have no entry for Authenticated Users either: computer accounts may be unable to read those GPOs (MS16-072).
- A GPO whose permissions could not be read is reported as not evaluated instead of as a finding. The result is then Investigate, or Skipped when no GPO could be evaluated.

#### Related Tests
- `Test-MtAdGpoNoDomainComputersCount`.

#### Related links
- [Microsoft Learn - Group Policy management](https://learn.microsoft.com/windows-server/identity/ad-ds/manage/group-policy/group-policy-overview) 
- ANSSI checkpoint: https://www.anssi.gouv.fr/

## Details

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

| Field | Value |
| --- | --- |
| Test ID | AD-GPOREP-06 |
| Severity | Low |
| Suite | Active Directory |
| Product | Active Directory |
| Feature | Group Policy |
| Area | Access control |
| Resource type | GroupPolicy |
| User impact | Low |
| Implementation cost | Medium |
| MITRE ATT&CK | None |
| PowerShell test | [Test-MtAdGpoNoDomainComputersCount](https://github.com/maester365/maester/blob/main/tests/ad/gpo-state/Test.AD-GPOREP-06.ps1) |
| Services | ActiveDirectory |
| Permissions | ActiveDirectory:Ldap:groupPolicyContainer.gPCFileSysPath:ReadProperty, ActiveDirectory:File:SYSVOL:Read |

</details>

## Source

- Test: [`tests/ad/gpo-state/Test.AD-GPOREP-06.ps1`](https://github.com/maester365/maester/blob/main/tests/ad/gpo-state/Test.AD-GPOREP-06.ps1)
- Documentation: [`tests/ad/gpo-state/Test.AD-GPOREP-06.md`](https://github.com/maester365/maester/blob/main/tests/ad/gpo-state/Test.AD-GPOREP-06.md)