MC1037768 - Microsoft Teams: Users can report security concerns involving external collaborators

Updated March 31, 2025: We have updated the rollout timeline below. Thank you for your patience.

Coming soon: Microsoft Teams users will be able to report security risks and concerns with external users outside your organization in one-on-one chats, group chats, and meeting chats. Note: Shared channels are not supported at this time. As an admin, this feature will be available for you to enable it.

This message is associated with Microsoft 365 Roadmap ID 481147.

This message applies to Teams for Windows desktop, Teams for Mac desktop, and Teams for the web.

When this will happen:

Targeted Release: We will begin rolling out early May 2025 and expect to complete by mid-May 2025.

General Availability (Worldwide): We will begin rolling out mid-May 2025 and expect to complete by late May 2025.

How this will affect your organization:

After this rollout, Teams users can hover on a chat message, select the three-dot menu, and then select Report message to report a message-based security concern when chatting or meeting with users outside their organization:

This feature will be available by default for admins to configure.

What you need to do to prepare:

Review your existing reporting configuration in the Teams admin center > Settings & policies > Global (Org-wide default) settings > Report a security concern and enable the new feature if you want your users to take advantage of it:

This rollout will happen automatically by the specified dates with no admin action required before the rollout. You may want to notify your users about this change and update any relevant documentation.

Learn more: User reported message settings in Teams - Microsoft Defender for Office 365 | Microsoft Learn (will be updated before rollout begins)