# TLS inspection is enabled and correctly configured for outbound traffic

TLS inspection decrypts and inspects HTTPS traffic, enabling visibility into encrypted sessions.

Source: https://maester.dev/docs/tests/ZTA.25411

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## Overview

TLS inspection decrypts and inspects HTTPS traffic, enabling visibility into encrypted sessions. Without it, many Microsoft Entra Internet Access features can't function, including URL filtering and advanced threat detection. Most internet traffic is encrypted, so TLS inspection is essential for applying security policies to most user activity.

## Remediation

- [Configure Transport Layer Security Inspection Policies](https://learn.microsoft.com/entra/global-secure-access/how-to-transport-layer-security?wt.mc_id=zerotrustrecommendations_automation_content_cnl_csasci)

## Run it

The check runs as part of the whole assessment, with the ZeroTrustAssessment module installed:

```powershell
Install-Module ZeroTrustAssessment -Scope CurrentUser
Connect-Maester
Invoke-Maester -Pack ZTA -SkipBuiltIn
```

Leave out `-SkipBuiltIn` to run Maester's own checks in the same run.

<details>
<summary>About this check</summary>

| | |
| --- | --- |
| Severity | High |
| Effort to fix | High |
| Impact on users | Medium |
| Pillar | Network |
| Category | Global Secure Access |
| Product | [Entra ID](/docs/tests/products/entra) |
| Feature | Global Secure Access |
| Area | Access control |
| ATT&CK | [T1573](/docs/tests?mitre=T1573) Encrypted Channel, [T1071.001](/docs/tests?mitre=T1071.001) Web Protocols |
| Licence | Entra_Premium_Internet_Access |
| Tenant | Workforce |

Product, feature, area and ATT&CK are Maester's: the assessment does not record them, so Maester keeps them in the pack's `taxonomy.json`.

</details>

<p class="mt-ms-note not-content"><svg class="mt-ms-note__logo" viewBox="0 0 21 21" aria-hidden="true"><rect width="10" height="10" fill="#f25022"/><rect x="11" width="10" height="10" fill="#7fba00"/><rect y="11" width="10" height="10" fill="#00a4ef"/><rect x="11" y="11" width="10" height="10" fill="#ffb900"/></svg><span>A Microsoft check, part of the <a href="/docs/tests/packs/zero-trust-assessment">Zero Trust Assessment</a> pack. Text from ZeroTrustAssessment 3.1.0, © Microsoft, <a href="/docs/tests/packs/zero-trust-assessment#licence">MIT licence</a>.</span></p>
