# (L1) Restrict guest access to Fabric

Guest access to Microsoft Fabric is disabled or limited to one or more security groups.

Source: https://maester.dev/docs/tests/CIS.M365.9.1.1

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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 · Export and sharing settings · <a href="/docs/tests">All checks</a></p>

```powershell title="Run this check"
Invoke-Maester -TestId CIS.M365.9.1.1
```

## Overview

Guest access to Microsoft Fabric is disabled or limited to one or more security groups.

Limiting which guest accounts can enter Fabric reduces exposure from external identities. Item and workspace permissions still determine which content a guest can access.

#### 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 **Export and Sharing settings**.
4. Set **Guest users can access Microsoft Fabric** to **Disabled**, or choose **Enabled** with **Specific security groups** selected and defined. If the organization doesn't actively use this feature, keep it **Disabled**.
5. Select **Apply**.

#### Related links

* [Export and sharing tenant settings](https://learn.microsoft.com/fabric/admin/service-admin-portal-export-sharing)
* [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.M365.9.1.1 |
| Severity | Medium |
| Suite | CIS |
| Product | Microsoft Fabric |
| Feature | Export and sharing settings |
| Area | External access and sharing |
| Resource type | Tenant |
| User impact | Medium |
| Implementation cost | Low |
| MITRE ATT&CK | T1078.004 Cloud Accounts |
| Supports benchmark | CIS Microsoft 365 Foundations Benchmark (version 7.0.0), requirement 9.1.1 |
| Benchmark level | L1 |
| Benchmark profiles | E3 Level 1 |
| Supports controls | cis-m365:9.1.1, nist-800-53-r5:AC-3 |
| PowerShell test | [Test-MtCisFabricGuestAccessRestricted](https://github.com/maester365/maester/blob/main/tests/cis/Test.CIS.M365.9.1.1.ps1) |
| Services | Azure |

</details>

## Source

- Test: [`tests/cis/Test.CIS.M365.9.1.1.ps1`](https://github.com/maester365/maester/blob/main/tests/cis/Test.CIS.M365.9.1.1.ps1)
- Documentation: [`tests/cis/Test.CIS.M365.9.1.1.md`](https://github.com/maester365/maester/blob/main/tests/cis/Test.CIS.M365.9.1.1.md)