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Developer Blogs

Mailbox requirement set 1.16 is now generally available for Outlook add-ins. This release reflects our continued investment in closing the gap between COM/VSTO and web add-ins, with a focus on message and information security. Mailbox 1.16 introduces APIs and platform updates that...

Finding an illicit place to hide data.

We're excited to release React Native Windows 0.84.0, aligned with React Native 0.84.1. React Native Windows v0.84 delivers input-handling improvements such as standard click events and imperative focus, theme-aware defaults and robust hit-testing semantics. 🔥 What's New in RNW...

.NET 8 and .NET 9 will both reach end of support on November 10, 2026. Learn what this means and how to upgrade to .NET 10 (LTS).

SkiaSharp 4.148.0 is the first stable release of SkiaSharp v4. Learn what is new, why you should be excited, and join the SkiaSharp live event on June 30.

Use the WinApp CLI to add identity to and package .NET desktop applications, enabling deeper integration to Windows and easier distribution.

At Microsoft Build 2026, we introduced WSL containers, bringing Linux container development directly into Windows through the Windows Subsystem for Linux (WSL). Containers have become a foundational part of modern development - from cloud-native applications and AI workloads to testing...

If you’re building and maintaining Visual Studio extensions, you’ve probably ended up with some sort of build and publishing workflow - whether it’s manual, scripted, or stitched together over time. This post is for extension authors who want a simple, repeatable way to build,...

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Part 2 of Build your own claw and agent harness with Microsoft Agent Framework. In Part 1 we stood up a harness and gave our personal finance assistant its first abilities: a custom tool, web search, and planning. It can talk about the markets - but it can't yet touch your data, and...

Remote Event Receivers in SharePoint Online are retiring. Starting July 1, 2027, all remote event receivers will stop firing events, including those registered using Microsoft Entra applications.

The wait is over. Spring AI 2.0 is generally available, and Azure Cosmos DB is right there with it. With this release, Spring AI graduates into a mature, production-ready framework for building AI applications in Java, and Azure Cosmos DB ships dedicated, vendor-maintained...

A combined May and June recap. A new azd tool command group, the cross-platform azd exec runner, safer multi-layer provisioning, an interactive Ctrl+C cancel prompt, Go support for Azure Functions, self-contained extension bundles, per-tenant subscription filters, and a long list of correctness fixes for parallel Container Apps deploys and authentication.

Tying two bugs together.

How we solved the challenge of passing conversational context between independently deployed agents using the A2A protocol's embedded context pattern, keeping domain agents stateless and secure.

Pure Virtual C++ is back for its 7th year! Join us on July 21 for a free, one-day virtual conference for the whole C++ community.

If an agent isn't doing the right thing, the obvious move is to make the docs clearer. Add a tip, spell out the correct command, describe the right approach more prominently. You do all of that, and the agent still ignores it. It does what it had already decided to do. The tip wasn't...

See how Microsoft is transforming software development with agentic workflows, AI-powered automation, and specialized agents across the engineering lifecycle.

Figuring out how it went missing.

In the previous post in the series, we covered the security decisions you make on day one. In this part, we will talk about how to give your app access to Cosmos DB data, using roles and a managed identity instead of keys. The situation You’ve built your app. It works locally. Now...

Learn what is new in Visual Studio Code 1.126 Read the full article

A roundup of what shipped in the Azure Functions MCP extension since preview: resource and prompt triggers, MCP Apps, built-in MCP authentication, structured and rich content, fluent .NET configuration APIs, and what is coming next.

This is the fifth article in a series about Agent Experience (AX): the practice of making AI coding agents work correctly with your technology. The series covers what you can and can't control in the agent stack, how to measure whether your extensions are helping or hurting, and how to...

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C++ developers can now bring IDE-style semantic intelligence into Copilot CLI with less setup. The C++ language server plugin supports richer code navigation, diagnostics, symbol understanding, and code changes by using the same build context your compiler does. That build context...

As previously mentioned to 'install' a package, as people think of the term, Windows actually performs two separate operations: staging and registration. To oversimplify: Staging puts the package content on disk. At this point the package is present, but inert and unused. Registering...