Teams calls are about to get a lot harder to fake
Microsoft will roll out Brand Impersonation Protection in Teams Calling from mid-May 2026, warning users about suspicious inbound VoIP calls impersonating trusted brands.
Microsoft Teams Calling is gaining Brand Impersonation Protection, which evaluates inbound VoIP calls from first-time external callers for signs of brand impersonation and displays warnings before users answer high-risk calls. The feature rolls out from mid-May 2026 with completion expected by late May 2026, is enabled by default, and requires no administrative action. Users can accept, block, or end flagged calls, and alerts may continue throughout a call if suspicious activity persists. Microsoft recommends preparing helpdesk teams and updating security awareness materials ahead of deployment.
- Feature evaluates inbound VoIP calls for brand impersonation and warns users before answering.
- Rolls out mid-to-late May 2026, enabled by default, no admin action required.
- Users can accept, block, or end flagged calls; alerts may persist during calls.
Full article170 words · extracted from helpnetsecurity.com · click to collapse
Microsoft Teams Calling is getting a new feature that will warn users about suspicious inbound VoIP calls from first-time external callers who might be impersonating trusted brands.
Brand Impersonation Protection is scheduled to roll out in mid-May 2026 and is expected to complete by late May 2026. The company says the feature aims to reduce social engineering risks and strengthen tenant security.
The feature works by evaluating inbound calls for signs of brand impersonation and displaying warnings before users answer calls identified as high risk. If suspicious activity continues during the conversation, Teams may continue showing alerts throughout the call.
Users will have the option to accept, block, or end the call. The feature will be enabled by default, and existing Teams Calling policies will remain unchanged.
Microsoft said that no administrative action is currently required, though organizations may want to prepare helpdesk teams and update internal security awareness materials before the feature rolls out. The company noted that additional caller ID security documentation will be published ahead of deployment.
Text extracted automatically; images, tables and formatting may be missing. Original: https://www.helpnetsecurity.com/2026/05/07/microsoft-teams-calling-brand-impersonation-protection/