What can an AI agent do with
Read and write your Teams chats (Chat.ReadWrite, delegated)?
It can read your one-on-one and group chats in Microsoft Teams and write in them, including posting messages as you.
How to spot it
On a Microsoft 365 (Microsoft Graph) connection or settings screen, this is Chat.ReadWrite.
With it, an agent can
- Read your one-on-one and group chat messages
- Post messages in your chats under your name
It cannot, on its own
- Post in Teams channels (that is a separate permission, ChannelMessage.Send)
What a bad day looks like
If a message tricks the agent, it could post a wrong answer or a bad link to a coworker that looks like you wrote it.
Set it up safer
- If it only needs to send, ask for ChatMessage.Send, which covers sending and does not include reading your chats.
- If it only needs to read, ask for Chat.Read.
- If it only needs chat names and members, ask for Chat.ReadBasic.
Narrower permissions on Microsoft 365 (Microsoft Graph):
- Send Teams chat messages as you (ChatMessage.Send, delegated)
ChatMessage.Send
Ask the company selling the agent
- Does the agent need to read my chats, or only send?
- Will every message it posts wait for my approval?
- Do you store copies of my chat messages?
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.