What can an AI agent do with
Send Teams chat messages as you (ChatMessage.Send, delegated)?
It can send one-on-one and group chat messages in Microsoft Teams as you.
How to spot it
On a Microsoft 365 (Microsoft Graph) connection or settings screen, this is ChatMessage.Send.
With it, an agent can
- Send Teams chat messages under your name, to one person or a group
It cannot, on its own
- Read your Teams chats with this permission alone
- Post in Teams channels (that needs ChannelMessage.Send)
What a bad day looks like
A tricked agent could message your staff as you, for example asking someone to buy gift cards or share a password.
Set it up safer
- Ask for an approval step so you see each message before it goes out.
- Give the agent its own Microsoft 365 account so its messages do not come from your name.
Ask the company selling the agent
- Does every message wait for my approval before it sends?
- Who will the agent message, and when?
- Can I see a log of every message it sent as me?
Source
Checked against Microsoft 365 (Microsoft Graph) documentation on 2026-09-28. All Microsoft 365 (Microsoft Graph) permissions →
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This page explains what a permission allows. It does not describe, test or rate any product. Permission details are summarized in our own words from the provider's documentation, linked on the page; providers change their documentation, so check the source before you rely on a detail.