# Sites without subnet associations count should be retrievable

Sites without subnet associations cannot be used for client site assignment:

Source: https://maester.dev/docs/tests/AD-SITE-04

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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 · Sites and subnets · <a href="/docs/tests">All checks</a></p>

```powershell title="Run this check"
Invoke-Maester -TestId AD-SITE-04
```

## Overview

Sites without subnet associations cannot be used for client site assignment:

- **Authentication inefficiency**: Clients may authenticate to distant DCs
- **Replication issues**: Site topology may not reflect actual network boundaries
- **Configuration gaps**: Sites may have been created incompletely
- **Client confusion**: Computers cannot determine their site membership

Every site that should be used for client location must have at least one subnet assigned.

#### Control Type

**Operational**

#### Security Recommendation

- Assign appropriate subnets to all production sites
- Remove sites that are no longer needed
- Ensure subnet assignments accurately reflect network boundaries
- Review site-subnet mappings during network changes

#### How the Test Works

This test analyzes subnet-to-site associations to identify sites that have no subnets assigned to them.

#### Related Tests

- `Test-MtAdSiteWithoutSubnetDetails` - Lists sites without subnet associations
- `Test-MtAdSubnetWithoutSiteCount` - Identifies orphaned subnets
- `Test-MtAdSiteTotalCount` - Counts total sites in the domain

## Details

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

| Field | Value |
| --- | --- |
| Test ID | AD-SITE-04 |
| Severity | Info |
| Suite | Active Directory |
| Product | Active Directory |
| Feature | Sites and subnets |
| Area | Infrastructure hardening |
| Resource type | AdSite |
| MITRE ATT&CK | None |
| PowerShell test | [Test-MtAdSiteWithoutSubnetCount](https://github.com/maester365/maester/blob/main/tests/ad/site/Test.AD-SITE-04.ps1) |
| Services | ActiveDirectory |
| Permissions | ActiveDirectory:Ldap:site:ReadProperty, ActiveDirectory:Ldap:subnet:ReadProperty |

</details>

## Source

- Test: [`tests/ad/site/Test.AD-SITE-04.ps1`](https://github.com/maester365/maester/blob/main/tests/ad/site/Test.AD-SITE-04.ps1)
- Documentation: [`tests/ad/site/Test.AD-SITE-04.md`](https://github.com/maester365/maester/blob/main/tests/ad/site/Test.AD-SITE-04.md)