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Maester 3.0: a new test engine, and a heads-up for preview users

· 14 min read
Merill Fernando
Merill Fernando
Maester maintainer + Product Manager, Microsoft

Maester 3.0 merges into main on Thursday, 8 October 2026 at 10:00 UTC (8 pm AEST). From that moment the preview build of Maester on the PowerShell Gallery is Maester 3.0, and 3.0 has breaking changes.

If you run Maester in automation with the preview build, switch to the release build now

Your next scheduled run after the merge will pick up 3.0. The biggest change is that Maester 3.0 needs PowerShell 7.4 or later. Windows PowerShell 5.1 is no longer supported. We've worked hard to keep your custom tests (including Pester tests) working, but a rewrite this size will have rough edges.

You're on the preview build if your pipeline does any of these:

  • Install-Module Maester -AllowPrerelease or Update-Module Maester -AllowPrerelease
  • maester_version: preview in the Maester GitHub Action

To stay on 2.x, install the release build instead: drop -AllowPrerelease, or pin the version with Install-Module Maester -RequiredVersion 2.3.0. In the GitHub Action, use maester_version: latest.

NowMove automation off the preview build
8 Oct, 10:00 UTC3.0 merges into main and becomes the preview build
After thatWe fix what the preview finds, then ship 3.0 as the release build

If you're using Maester interactively and want to see what's coming, the preview is exactly where we want you. Try it, and tell us what breaks.

Introducing Maester 2.2 🚀

· 11 min read
Maester Team
Maester Team
Maester Contributors

Maester 2.2 is here, and it's our biggest expansion of security coverage yet.

Since 2.1.0 shipped in May, the community has kept up an incredible pace: 261 commits and 311 new tests. Maester now stretches all the way from your on-premises Active Directory to AI data security with Microsoft Purview, SharePoint Online, GitHub, Global Secure Access, and Intune.

What's new in Maester 2.1.0

· 7 min read
Maester Team
Maester Team
Maester Contributors

When we launched Maester 2.0, it was our biggest release yet. Since then the project has kept moving: more than 540 commits, 1,900 files touched, and the published test documentation has grown from 128 to 168 tests.

This release brings Maester into more of the places security teams live every day: Azure DevOps, Microsoft Defender for Endpoint, Copilot Studio, entitlement management, multi-tenant operations, and the report experience itself.

Maester June 2025 Release

· 4 min read
Merill Fernando
Merill Fernando
Maester maintainer + Product Manager, Microsoft

The Maester community of contributors have been hard at work and we are excited to announce the June 2025 release of Maester! 🎉

June stats

Here are some quick stats for you:

❇️ 55,000+ tenants have used Maester to improve their security posture

🚀 260,000+ downloads of Maester on PowerShell Gallery

💻 2,600+ commits on GitHub

🤝 72+ contributors

✳️ 285 Maester tests (90+ new tests!)

📦 252 releases

There's a lot to cover, so let's dive right in!

Maester Terraform Module

· 2 min read
Brian Veldman
Brian Veldman
Cloud Solution Architect, Fellowmind
Merill Fernando
Merill Fernando
Maester maintainer + Product Manager, Microsoft

Today, we are thrilled to announce the release of the Maester DevOps Terraform Module! This module streamlines the setup of Maester in Azure DevOps and automates test execution via Azure DevOps Pipelines. 🔥