# Inherited object type details should be investigated

Inherited object type detail helps explain where inheritable ACEs are intended to apply.

Source: https://maester.dev/docs/tests/AD-DACL-18

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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 · Permissions and delegation · <a href="/docs/tests">All checks</a></p>

```powershell title="Run this check"
Invoke-Maester -TestId AD-DACL-18
```

## Overview

Inherited object type detail helps explain where inheritable ACEs are intended to apply.

- **Scoping transparency**: Reveals which descendant object classes are targeted most often
- **Delegation review**: Helps validate whether inherited permissions are narrowly or broadly applied
- **Troubleshooting support**: Useful when investigating unexpected effective permissions on child objects

#### Control Type

**Operational**

#### Security Recommendation

- Review heavily used inherited object type targets for overly broad delegations
- Confirm that inherited ACE scope matches intended administrative boundaries
- Reassess inherited rights on sensitive containers if descendant object targeting is not well understood

#### How the Test Works

This test reads `$adState.DaclEntries`, filters out the all-zero `InheritedObjectType` value, and groups the remaining ACEs by inherited object type GUID.

#### Related Tests

- `Test-MtAdDaclInheritedObjectTypeCount` - Counts distinct inherited object type GUIDs
- `Test-MtAdDaclPrivilegedExtendedRightIdentity` - Shows identities with privileged extended rights
- `Test-MtAdDaclUnresolvedSidDetails` - Lists objects containing orphaned SID ACEs

> **Note:** This test is `LongRunning`. It loads the full DACL dataset, which can consume significant memory in large Active Directory environments. Use `Invoke-Maester -IncludeLongRunning` to run it.

## Details

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

| Field | Value |
| --- | --- |
| Test ID | AD-DACL-18 |
| Severity | Info |
| Suite | Active Directory |
| Product | Active Directory |
| Feature | Permissions and delegation |
| Area | Access control |
| Resource type | Permission |
| MITRE ATT&CK | None |
| PowerShell test | [Test-MtAdDaclInheritedObjectTypeDetails](https://github.com/maester365/maester/blob/main/tests/ad/dacl/Test.AD-DACL-18.ps1) |
| Services | ActiveDirectory |
| Permissions | ActiveDirectory:Ldap:*.ntSecurityDescriptor:ReadControl |
| Long running | Yes |

</details>

## Source

- Test: [`tests/ad/dacl/Test.AD-DACL-18.ps1`](https://github.com/maester365/maester/blob/main/tests/ad/dacl/Test.AD-DACL-18.ps1)
- Documentation: [`tests/ad/dacl/Test.AD-DACL-18.md`](https://github.com/maester365/maester/blob/main/tests/ad/dacl/Test.AD-DACL-18.md)