MC1530615 - Microsoft Teams: Report guest invitations for security concerns
Microsoft 365 Message Center announcement MC1530615.
MS Message Center's Summary
Microsoft is introducing a feature in early November 2026 allowing users to report suspicious guest invitations within Teams. Reports will route to the Teams admin center and Microsoft for security review. Administrators should verify their existing messaging policies to ensure proper oversight of this new user reporting capability before rollout completes in mid November 2026.
- Administrator impact
- Review existing messaging policies in the Teams admin center to manage the security concern reporting capability.
- End user impact
- Users gain the ability to report suspicious external guest invitations when declining them.
- Importance
- 3/10: This is a new security reporting capability that requires administrative awareness but no mandatory configuration changes.
Microsoft Summary
Microsoft Teams will let users report suspicious guest invitations for security concerns starting November 2026. Reports go to IT admins via the Teams admin center and Microsoft. No action is needed if "Report a security concern" is already enabled in messaging policies, which control this feature.
- Message Center ID
- MC1530615
- Category
- stay Informed
- Severity
- normal
- Services
- Microsoft Teams
- Tags
- New feature, User impact, Admin impact
- Roadmap ID
- 571297
- Platforms
- Desktop, Mac, Web
- Published
- 2026-10-29
- Last updated
- 2026-10-29
- Expires
- 2027-01-15
[What and Why:] Microsoft Teams will enable users to report guest invitations for security concerns directly from Teams. When users receive an unexpected or potentially malicious invitation to join another organization as a guest, they can report it to their IT admin for review, helping identify and mitigate phishing and other abuse through guest invitations. [Rollout Schedule:] General Availability (Worldwide): We will begin rolling out in early November 2026 and expect to complete by mid-November 2026. [Impact on Your Organization:] Users can report suspicious guest invitations when declining them in Teams. Reports are shared with their IT admin through the User reported security submissions report in the Teams admin center and with Microsoft for review. [Action Required/Recommendations:] No action is required for organizations that already have Report a security concern enabled in their Teams messaging policy. Admins can manage this capability through Teams admin center > Messaging policies > Report a security concern . [Compliance considerations:] Question Answer Does the change include an admin control? Yes. The capability is controlled through the Teams messaging policy setting for Report a security concern.