What Microsoft 365 Copilot is
An assistant embedded in the Microsoft 365 applications an organisation already uses. It drafts in Word, analyses in Excel, builds slides in PowerPoint, handles mail in Outlook and summarises Teams meetings.
Because it reads Microsoft Graph, it can work from your own mail, files, calendar and meeting context rather than from a blank prompt.
What you can do with it
- Draft and rewrite documents in Word
- Analyse and summarise data in Excel
- Generate presentations in PowerPoint
- Draft and prioritise email in Outlook
- Summarise meetings and actions in Teams
- Build custom agents through Copilot Studio
Who it is for
- Organisations already on Microsoft 365
- Knowledge workers moving between mail, documents and meetings
- Medium and large enterprises
- Teams with strict security and compliance requirements
What to watch out for
- Connecting to Graph means the assistant can read mail and files subject to existing permissions, so access review matters
- Generated content still needs checking before it goes to anyone outside
- Enterprise data boundaries and retention should be confirmed with your administrator
- Licensing and availability vary by plan and region
Pros & cons
✓ What we like
- Works inside tools people already use
- Grounded in your organisation's own data
- Enterprise security and compliance framing
- Extensible with custom agents
! What to watch out for
- Depends on existing permission hygiene
- Availability varies by plan and region
FAQ
Where does it work?
Inside Word, Excel, PowerPoint, Outlook and Teams, plus Copilot Chat and Copilot Studio.
What data does it use?
Microsoft Graph content such as mail, documents, calendar and meetings, subject to your existing permissions.
Does it only answer questions?
No. It also writes documents, analyses tables, builds presentations and summarises meetings.
Last reviewed: 2026-09-19
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