MC1519866 Stay informedNew featureUser impactAdmin impact

Microsoft Teams: Phishing detection for messaging

Roadmap: 575288
Platforms: Android, Desktop, iOS, Mac, Web

Rollout dates are often only in the text. When Microsoft moves them, the change shows under "What changed".

What the notice says

Microsoft's text, with its sections, lists and tables; source markup removed

What and why

Microsoft Teams is introducing AI-powered, context-aware phishing detection to help identify phishing, social engineering, impersonation attempts, and deceptive intent. The capability analyzes conversation context to identify suspicious behavior that may not include traditional indicators such as malicious links or files.

Rollout schedule

Targeted Release: Beginning in early November 2026 and expected to complete by mid-November 2026
General Availability (Worldwide): Beginning in early December 2026 and expected to complete by mid-December 2026

Impact on your organization

Who is affected

For most users, detection focuses on external first-contact chats.
Teams mobile users in China may also receive additional phishing and fraud protection for in-tenant conversations.

Platforms and services

Microsoft Teams

What will happen

Teams will use AI-powered, context-aware detection to identify potential phishing and related suspicious behavior.
During initial quality validation, detection may run in the background without showing warnings to users.
After validation, users may see a warning when potential phishing is detected:

For Teams mobile users in China, additional protection may also apply to in-tenant conversations to address fraud patterns observed in the region.
This capability is used only for security protection and not for productivity, summarization, advertising, user monitoring, or other non-security purposes.
Customer message content is not retained by the detection system for model training or other secondary uses.
No new admin configuration is required.

Action required and recommendations

No admin action is required to enable this protection.

We recommend that admins review organizational guidance for interacting with unfamiliar external contacts and remind users to report suspicious activity or incorrect detections through available Teams reporting experiences.

Learn more

Phishing content detection in Microsoft Teams | Microsoft Support

Compliance considerations

Question	Answer
Does the change alter how existing customer data is processed, stored, or accessed?	Yes. Teams analyzes conversation context to detect suspicious behavior. The request states that customer message content is not retained by the detection system for model training or other secondary uses.
Does the change introduce or significantly modify AI/ML capabilities that interact with customer data?	Yes. The change introduces AI-powered, context-aware detection that analyzes conversation context for phishing, social engineering, impersonation attempts, and deceptive intent.

Phishing content detection in Microsoft Teams | Microsoft Support

What changed

Between the versions this installation saw, newest first

This installation has seen one version of this notice, first on 22 Oct 2026. Later changes will show here.

Linked documentation

Microsoft pages the notice links to

The notice links to no Microsoft Learn or Support page that this installation reads.

Vendor roadmap · 14 Oct 2026
Microsoft Teams: Phishing Detection in Teams Messaging

Not confirmed here

What this page cannot tell you

Whether your tenant is affected: this is Microsoft's notice, not a check of your settings.