# Only users with the Guest Inviter role SHOULD be able to invite guest users

Only users with the Guest Inviter role SHOULD be able to invite guest users.

Source: https://maester.dev/docs/tests/CISA.MS.AAD.8.2

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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><a class="test-byline-avatar" href="/contributors/michaelmsonne" title="Michael Morten Sonne · Co-contributor"><img src="https://github.com/michaelmsonne.png" alt="Michael Morten Sonne" width="28" height="28" loading="lazy" decoding="async" /></a><a class="test-byline-avatar" href="/contributors/mattcave" title="Matt Cave · Co-contributor"><img src="https://github.com/mattcave.png" alt="Matt Cave" 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> with 2 co-contributors</span><a class="test-byline-link" href="/contributors">All contributors →</a></div></div>

<p class="test-part">Part of <a href="/docs/tests/cisa">CISA</a> · Entra ID · External identities · <a href="/docs/tests">All checks</a></p>

```powershell title="Run this check"
Invoke-Maester -TestId CISA.MS.AAD.8.2
```

## Overview

Only users with the Guest Inviter role SHOULD be able to invite guest users.

Rationale: By only allowing an authorized group of individuals to invite external users to create accounts in the tenant, an agency can enforce a guest user account approval process, reducing the risk of unauthorized account creation.

#### Remediation action:

1. In **Entra ID** and **External Identities**, select **[External collaboration settings](https://entra.microsoft.com/#view/Microsoft_AAD_IAM/CompanyRelationshipsMenuBlade/~/Settings/menuId/Settings)**.
2. Under **Guest invite settings**, select **Only users assigned to specific admin roles can invite guest users** or **No one in the organization can invite guest users including admins (most restrictive)**.

3. Click **Save**.

#### Related links

* [Entra admin center - External Identities | External collaboration settings](https://entra.microsoft.com/#view/Microsoft_AAD_IAM/CompanyRelationshipsMenuBlade/~/Settings/menuId/Settings)
* [CISA Guest User Access - MS.AAD.8.2v1](https://github.com/cisagov/ScubaGear/blob/main/PowerShell/ScubaGear/baselines/aad.md#msaad82v1)
* [CISA ScubaGear Rego Reference](https://github.com/cisagov/ScubaGear/blob/main/PowerShell/ScubaGear/Rego/AADConfig.rego#L1157)

## Details

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

| Field | Value |
| --- | --- |
| Test ID | CISA.MS.AAD.8.2 |
| Severity | Medium |
| Suite | CISA |
| Product | Entra ID |
| Feature | External identities |
| Area | External access and sharing |
| Resource type | Tenant |
| User impact | Medium |
| Implementation cost | Low |
| MITRE ATT&CK | T1098.003 Additional Cloud Roles, T1136.003 Cloud Account |
| Supports benchmark | CISA SCuBA Secure Configuration Baselines for Microsoft 365 (version ScubaGear main, 2026-10-11), requirement MS.AAD.8.2 |
| Criticality | SHOULD |
| Upstream requirement | MS.AAD.8.2v1 |
| Supports controls | cisa-scuba:MS.AAD.8.2, nist-800-53-r5:AC-6(10) |
| PowerShell test | [Test-MtCisaGuestInvitation](https://github.com/maester365/maester/blob/main/tests/cisa/entra/Test.CISA.MS.AAD.8.2.ps1) |
| Services | Graph |

</details>

## Source

- Test: [`tests/cisa/entra/Test.CISA.MS.AAD.8.2.ps1`](https://github.com/maester365/maester/blob/main/tests/cisa/entra/Test.CISA.MS.AAD.8.2.ps1)
- Documentation: [`tests/cisa/entra/Test.CISA.MS.AAD.8.2.md`](https://github.com/maester365/maester/blob/main/tests/cisa/entra/Test.CISA.MS.AAD.8.2.md)