New Agent Mode in with M365 Copilot

A new experience called vibe working is being launched within M365 Copilot called Agent Mode within Office Apps.  If you are not familiar with the term “vibe working”, it is a new agentic, collaborative workflow where users and AI iteratively refine content together.  It is really slick.

When running in Agent Mode, users will have an interactive, conversational experience with Copilot for creating and modifying content and data in solutions like Microsoft Word and Excel.  For instance, when you are in Word, you just ask Copilot that you need it to create content like “Please create me a report about XYZ customer, along with recent market trends influencing customers decisions and what solutions they should consider”.  Copilot will write this content.  You can then ask Copilot to iterate on by asking to more emphasis on a particular solution, and it will go through modifying it; pretty amazing.

Same for Excel, when running in Agent Mode, you can ask Copilot to do a full analysis of data a spreadsheet, and ask for Copilot to provide specific insights that that you need to have.  Copilot will then create formulas and data visualizations to provide you that insight.

Additionally, there is a new Office Agent that is available in Copilot Chat.  This enables users to create Word and PowerPoint documents inside of Chat without having to open the Office App.  Copilot Chat will do deep research and reasoning to produce high quality content.

Reference: https://www.microsoft.com/en-us/microsoft-365/blog/2025/09/29/vibe-working-introducing-agent-mode-and-office-agent-in-microsoft-365-copilot/