Microsoft Teams: Tenant-Owned Domain Impersonation Protection for Teams Messaging
Identify if an external user comes from a domain that is impersonating the recipient tenant’s own domains, during their initial contact with an enterprise user via Teams messages.

| Product | Microsoft Teams |
|---|---|
| Release phase | General Availability |
| Release date | December CY2025 |
| Platform | Web |
| Cloud Instance | Worldwide (Standard Multi-Tenant) |
| Created | 2025-11-11 |
| Roadmap ID | 526780 |
| Roadmap Link | https://www.microsoft.com/microsoft-365/roadmap?id=526780 |

HANDS ON tek
M365 Admin


