Microsoft adds agent mode

Microsoft is pushing “agent mode” deeper into Word, Excel, and PowerPoint, turning Copilot from a sidebar assistant into a tool that edits files in place. (techcommunity.microsoft.com) Microsoft said on March 9 that Wave 3 of Microsoft 365 Copilot would bring these agentic features to Word, Excel, PowerPoint, and Outlook, alongside broader model choice inside Copilot. The company said customers can use OpenAI and Anthropic models in the same work stack instead of switching products. (blogs.microsoft.com) In Microsoft’s description, the system takes “multi-step, app-native actions” directly inside a document, workbook, or deck, with changes that are reviewable and reversible. In Excel, Microsoft said users can ask Copilot to build forecasts, refresh inputs, and pull current disclosures from the web into a working model. (techcommunity.microsoft.com) Microsoft’s support pages now describe agent mode as a content-creation agent inside Word, Excel, and PowerPoint, with Office Agent running on Anthropic models and using a multi-agent approach for complex tasks. The examples Microsoft gives are concrete: a financial close report in Excel, a seven-slide executive brief in PowerPoint, and a two-page customer brief in Word. (support.microsoft.com) The web-grounding piece matters because large language models age quickly. Microsoft’s February 2026 support note says Copilot Chat and Agents can generate a short Bing query from a prompt, use public web results to improve the answer, and show users the sources and the exact search query. (support.microsoft.com) Microsoft is also tying those features to tenant controls rather than treating them like open web tools. The company’s release notes say Copilot features roll out gradually within a tenant, and recent updates added more admin controls in the Microsoft 365 admin center for governing AI features. (learn.microsoft.com) That puts Microsoft closer to Google’s current direction. Google said in March that Gemini would work more deeply across Docs, Sheets, Slides, and Drive, using context from emails, chats, and files, and in December introduced Google Workspace Studio as a place to create and manage agents inside Workspace. (workspace.google.com, workspace.google.com) The competitive line is becoming clearer: the big vendors want AI work to happen inside the suite where employees already store files, permissions, labels, and chat history. Microsoft said Copilot honors Microsoft 365 permissions and sensitivity labels while letting users choose models inside the app surface itself. (techcommunity.microsoft.com) Microsoft has been building toward this for more than a year. In October 2024, it introduced autonomous agents for Dynamics 365 and Copilot Studio, and by March 2026 it had expanded that strategy into what it called “agentic experiences” across the core Office apps. (blogs.microsoft.com, blogs.microsoft.com) The result is less about adding another chatbot button and more about where AI work gets done. Microsoft is betting that drafting, modeling, and revising will increasingly happen inside the same Office files companies already control. (techcommunity.microsoft.com, support.microsoft.com)