# (L1) Restrict service principal access to Fabric public APIs

Service-principal access to Fabric public APIs is disabled or limited to one or more security groups.

Source: https://maester.dev/docs/tests/CIS.M365.9.1.10

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

<p class="test-part">Part of <a href="/docs/tests/cis">CIS</a> · Microsoft Fabric · Developer settings · <a href="/docs/tests">All checks</a></p>

```powershell title="Run this check"
Invoke-Maester -TestId CIS.M365.9.1.10
```

## Overview

Service-principal access to Fabric public APIs is disabled or limited to one or more security groups.

This setting governs APIs protected by the Fabric permission model. Restricting the allowed service principals reduces the impact of a compromised application identity.

#### Remediation action

1. Sign in to the [Microsoft Fabric admin portal](https://app.powerbi.com/admin-portal) with a Fabric administrator account.
2. Select **Tenant settings**.
3. Scroll to **Developer settings**.
4. Set **Service principals can call Fabric public APIs** to **Disabled**, or choose **Enabled** with **Specific security groups** selected and defined for the applications that need this access. If the organization doesn't actively use this feature, keep it **Disabled**.
5. Select **Apply**.

#### Related links

* [Developer admin settings](https://learn.microsoft.com/fabric/admin/service-admin-portal-developer#service-principals-can-call-fabric-public-apis)
* [CIS Microsoft 365 Foundations Benchmark v7.0.0](https://www.cisecurity.org/benchmark/microsoft_365)

## Details

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

| Field | Value |
| --- | --- |
| Test ID | CIS.M365.9.1.10 |
| Severity | Medium |
| Suite | CIS |
| Product | Microsoft Fabric |
| Feature | Developer settings |
| Area | Applications and workload identities |
| Resource type | Tenant |
| User impact | Low |
| Implementation cost | Low |
| MITRE ATT&CK | T1078.004 Cloud Accounts |
| Supports benchmark | CIS Microsoft 365 Foundations Benchmark (version 7.0.0), requirement 9.1.10 |
| Benchmark level | L1 |
| Benchmark profiles | E3 Level 1 |
| Supports controls | cis-m365:9.1.10, nist-800-53-r5:AC-3 |
| PowerShell test | [Test-MtCisFabricPublicApiAccessRestricted](https://github.com/maester365/maester/blob/main/tests/cis/Test.CIS.M365.9.1.10.ps1) |
| Services | Azure |

</details>

## Source

- Test: [`tests/cis/Test.CIS.M365.9.1.10.ps1`](https://github.com/maester365/maester/blob/main/tests/cis/Test.CIS.M365.9.1.10.ps1)
- Documentation: [`tests/cis/Test.CIS.M365.9.1.10.md`](https://github.com/maester365/maester/blob/main/tests/cis/Test.CIS.M365.9.1.10.md)