Microsoft Teams to Use AI for Detecting Phishing Attacks Using Teams Conversations

Key Points:

• Microsoft is introducing AI-powered phishing detection in Microsoft Teams to identify scams in conversations, especially during initial chats with external contacts where attackers impersonate support staff to extract sensitive information.
• The feature, announced in October 2026, will begin targeted release in early November and reach global general availability by mid-December, covering individual and group chats across mobile, desktop, and web platforms.
• Unlike traditional phishing detection based on malicious links or attachments, the new system analyzes conversation context to detect social engineering, impersonation, and deceptive intent, issuing warnings even when no harmful URLs are present.
• Initially, detection may operate silently for quality validation before visible warnings appear; users in China may also receive protection for internal chats due to regional fraud patterns.
• Microsoft emphasizes the feature is solely for security purposes, does not retain message content for secondary use, requires no admin setup, and recommends users verify suspicious contacts independently and report phishing attempts promptly.