Microsoft unveils Scout, desktop AI agent that acts on users’ behalf

Microsoft used its Build 2026 conference in San Francisco to push its AI strategy past chatbots and copilot-style helpers, unveiling Scout, a prerelease desktop agent for Windows and macOS that can read and write files, run shell commands, control a browser and query Microsoft 365 data.

The company is pitching Scout as more than a faster way to ask questions. It is meant to take action on a user’s behalf, working autonomously in the background while still asking for approval before sensitive steps. Microsoft says the agent can also launch specialized sub-agents for parallel research, code review and complex tasks, a design that signals the company wants AI to do more of the busywork that still keeps workers hopping between documents, browsers, mail and meetings.

That framing matters because the market is already crowded with assistants that answer prompts but stop short of execution. Microsoft’s claim is that Scout solves a different problem: not just generating text, but navigating the operating system and enterprise stack that surrounds the task. The product is tied directly into email, calendar, Teams messages, OneDrive files and meetings, giving it access to the working context that copilots often lack when they are confined to a chat box.

Microsoft has wrapped Scout in its Frontier preview program, which means the tool is still subject to change and available only to users who accept the terms of participation. That caution sits alongside a broader company push to make agentic software feel safe enough for office use. In March, Microsoft introduced its First Frontier Suite and put price tags on the enterprise pieces around it, including Agent 365 at $15 per user and Microsoft 365 E7 Frontier Suite at $99 per user. The company has also said Work IQ will power its next generation of agentic experiences.

Scott Hanselman, a Microsoft vice president and member of technical staff for Microsoft and GitHub based in Portland, Oregon, has previously described the gap between a large language model and an agent, warning that agents can become assertive if they are given too much access. That tension sits at the center of Microsoft’s latest pitch: give the software enough reach to be useful, but keep approvals, governance and auditability in place.

Build Live, Microsoft’s real-time announcement feed for the conference, replaced the company’s traditional Book of News format as it rolled out the new products across the June 2-3 event. Scout is the clearest example yet of where Microsoft wants workplace AI to go next, with fewer prompts and more delegated labor inside the tools people already use every day.