Microsoft 365 Copilot is Microsoft's AI assistant for work, built into apps such as Word, Excel, PowerPoint, Outlook and Teams.
In plain words
Copilot combines large language models with your organisation's content. Through a service called Microsoft Graph it can pull in your emails, files, meetings and calendar, so answers reflect your actual work. It only shows data you already have permission to view, and Microsoft says prompts and that work data are not used to train the underlying models. The full experience inside the Office apps comes with a paid add-on licence.
A quick example
Imagine asking Copilot to prepare you for a meeting. It can look across the related emails, shared files and calendar invite you have access to, and summarise what has been decided so far and what is still open.
Where you'll meet it
- Drafting and editing in Word, Excel and PowerPoint.
- Summarising email and meetings in Outlook and Teams.
- Answering questions about company files and messages.
Related
Sources
- DocsMicrosoft Copilot overview, Microsoft Learn · read 29 Sept 2026
- DocsData, privacy, and security for Microsoft Copilot, Microsoft Learn · read 29 Sept 2026
Checked by WhatIsAI against the sources above · 29 Sept 2026. Spotted an error? Report it.