# (L1) Restrict external sharing of semantic models

External sharing of Fabric semantic models is disabled or limited to one or more security groups.

Source: https://maester.dev/docs/tests/CIS.M365.9.1.8

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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.M365.9.1.8
```

## Overview

External sharing of Fabric semantic models is disabled or limited to one or more security groups.

This setting governs the in-place sharing of semantic models with users in another tenant. If misused, it can provide a path for data to be shared outside the organization. It is separate from OneLake external data sharing.

#### 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 **Allow specific users to turn on external data sharing** 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.M365.9.1.8 |
| 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 | T1567 Exfiltration Over Web Service |
| Supports benchmark | CIS Microsoft 365 Foundations Benchmark (version 7.0.0), requirement 9.1.8 |
| Benchmark level | L1 |
| Benchmark profiles | E3 Level 1 |
| Supports controls | cis-m365:9.1.8, nist-800-53-r5:AC-21 |
| PowerShell test | [Test-MtCisFabricExternalSharingRestricted](https://github.com/maester365/maester/blob/main/tests/cis/Test.CIS.M365.9.1.8.ps1) |
| Services | Azure |

</details>

## Source

- Test: [`tests/cis/Test.CIS.M365.9.1.8.ps1`](https://github.com/maester365/maester/blob/main/tests/cis/Test.CIS.M365.9.1.8.ps1)
- Documentation: [`tests/cis/Test.CIS.M365.9.1.8.md`](https://github.com/maester365/maester/blob/main/tests/cis/Test.CIS.M365.9.1.8.md)