check before: 2026-02-15
Product:
Teams
Platform:
Mac, Online, US Instances, Windows Desktop, World tenant
Status:
Feature Rollout Status Not Supported
Change type:
Admin impact, New feature, Updated message, User impact
Links:
Details:
Summary:
Brand Impersonation Protection for Teams Calling will roll out starting early May 2026, detecting and warning users of suspicious external calls to reduce fraud risks. It is enabled by default, requires no admin action, and aims to enhance security without changing existing calling policies.
Details:
Updated March 30, 2026: We have updated the timeline. Thank you for your patience.
[Introduction]
Brand Impersonation Protection for Teams Calling adds proactive safeguards against fraudulent or deceptive external callers who attempt to appear as trusted organizations. This helps reduce social-engineering risks and improves tenant security when users receive first-contact external calls. This update aligns with Microsoft's ongoing investments in caller identity protection and secure collaboration.
This message is associated with Microsoft 365 Roadmap ID 543239.
[When this will happen:]
Targeted Release: Rollout will begin early May (previously early April) and is expected to complete by late May (previously late April).
General Availability: Timelines will be communicated in a future message.
Change Category:
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Scope:
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Release Phase:
General Availability, Targeted Release
Created:
2026-01-21
updated:
2026-03-31
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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linked item details
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summary for non-techies**
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Direct effects for Operations**
User Experience Impact from High-Risk Call Warnings
Users may experience interruptions and confusion due to high-risk call warnings appearing before answering calls, potentially leading to missed important communications or delays in response time.
- roles: End Users, Helpdesk Staff
- references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=543239
Increased Training and Support Needs
Helpdesk staff may require additional training to assist users with the new high-risk call warnings, leading to increased workload and potential delays in support response times if not prepared.
- roles: Helpdesk Staff, IT Support
- references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=543239
Configutation Options**
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IT Security**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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change history
| Date | Property | old | new |
| 2026-03-31 | MC Last Updated | 02/26/2026 20:04:10 | 2026-03-30T20:57:59Z |
| 2026-03-31 | MC Messages | Updated February 26, 2026: We have updated the timeline. Thank you for your patience.
[Introduction] Brand Impersonation Protection for Teams Calling adds proactive safeguards against fraudulent or deceptive external callers who attempt to appear as trusted organizations. This helps reduce social-engineering risks and improves tenant security when users receive first-contact external calls. This update aligns with Microsoft's ongoing investments in caller identity protection and secure collaboration. This message is associated with Microsoft 365 Roadmap ID 543239. [When this will happen:] Targeted Release: Rollout will begin early April 2026 (previously mid-March) and is expected to complete by late April 2026 (previously late March). General Availability: Timelines will be communicated in a future message. | Updated March 30, 2026: We have updated the timeline. Thank you for your patience.
[Introduction] Brand Impersonation Protection for Teams Calling adds proactive safeguards against fraudulent or deceptive external callers who attempt to appear as trusted organizations. This helps reduce social-engineering risks and improves tenant security when users receive first-contact external calls. This update aligns with Microsoft's ongoing investments in caller identity protection and secure collaboration. This message is associated with Microsoft 365 Roadmap ID 543239. [When this will happen:] Targeted Release: Rollout will begin early May (previously early April) and is expected to complete by late May (previously late April). General Availability: Timelines will be communicated in a future message. |
| 2026-03-31 | MC End Time | 05/29/2026 09:00:00 | 2026-06-30T09:00:00Z |
| 2026-03-31 | MC Summary | Brand Impersonation Protection for Teams Calling will roll out from April to late April 2026, warning users of suspicious external calls to reduce fraud risks. It enables default high-risk call alerts without changing existing policies. No admin action is needed; prepare by informing helpdesk and updating training. | Brand Impersonation Protection for Teams Calling will roll out starting early May 2026, detecting and warning users of suspicious external calls to reduce fraud risks. It is enabled by default, requires no admin action, and aims to enhance security without changing existing calling policies. |
| 2026-03-17 | MC Feature Status | Feature Rollout Status Not Supported | |
| 2026-02-27 | MC Last Updated | 01/27/2026 18:17:25 | 2026-02-26T20:04:10Z |
| 2026-02-27 | MC Messages | Updated January 26, 2026: We have updated the timeline. Thank you for your patience.
[Introduction] Brand Impersonation Protection for Teams Calling adds proactive safeguards against fraudulent or deceptive external callers who attempt to appear as trusted organizations. This helps reduce social-engineering risks and improves tenant security when users receive first-contact external calls. This update aligns with Microsoft's ongoing investments in caller identity protection and secure collaboration. This message is associated with Microsoft 365 Roadmap ID 543239. [When this will happen:] Targeted Release: Rollout will begin mid-March 2026 (previously mid-February) and is expected to complete by late March 2026 (previously late February). General Availability: Timelines will be communicated in a future message. | Updated February 26, 2026: We have updated the timeline. Thank you for your patience.
[Introduction] Brand Impersonation Protection for Teams Calling adds proactive safeguards against fraudulent or deceptive external callers who attempt to appear as trusted organizations. This helps reduce social-engineering risks and improves tenant security when users receive first-contact external calls. This update aligns with Microsoft's ongoing investments in caller identity protection and secure collaboration. This message is associated with Microsoft 365 Roadmap ID 543239. [When this will happen:] Targeted Release: Rollout will begin early April 2026 (previously mid-March) and is expected to complete by late April 2026 (previously late March). General Availability: Timelines will be communicated in a future message. |
| 2026-02-27 | MC End Time | 04/27/2026 09:00:00 | 2026-05-29T09:00:00Z |
| 2026-02-27 | MC Summary | Brand Impersonation Protection for Teams Calling will roll out starting mid-March 2026, detecting and warning users of suspicious external calls to reduce fraud risks. It will be enabled by default, requires no admin action, and aims to enhance security without changing existing policies. | Brand Impersonation Protection for Teams Calling will roll out from April to late April 2026, warning users of suspicious external calls to reduce fraud risks. It enables default high-risk call alerts without changing existing policies. No admin action is needed; prepare by informing helpdesk and updating training. |
| 2026-01-28 | MC MessageTagNames | New feature, User impact, Admin impact | Updated message, New feature, User impact, Admin impact |
| 2026-01-28 | MC Summary | Brand Impersonation Protection for Teams Calling will launch mid-February 2026, warning users of suspicious external calls to reduce fraud risks. Enabled by default, it evaluates inbound calls for impersonation, showing high-risk alerts. No admin action is needed; organizations should prepare helpdesk and training accordingly. | Brand Impersonation Protection for Teams Calling will roll out starting mid-March 2026, detecting and warning users of suspicious external calls to reduce fraud risks. It will be enabled by default, requires no admin action, and aims to enhance security without changing existing policies. |
| 2026-01-28 | MC Last Updated | 01/21/2026 01:38:57 | 2026-01-27T18:17:25Z |
| 2026-01-28 | MC Messages | [Introduction]
Brand Impersonation Protection for Teams Calling adds proactive safeguards against fraudulent or deceptive external callers who attempt to appear as trusted organizations. This helps reduce social-engineering risks and improves tenant security when users receive first-contact external calls. This update aligns with Microsoft's ongoing investments in caller identity protection and secure collaboration. This message is associated with Microsoft 365 Roadmap ID 543239. [When this will happen:] Targeted Release: Rollout will begin mid-February 2026 and is expected to complete by late February 2026. General Availability: Timelines will be communicated in a future message. | Updated January 26, 2026: We have updated the timeline. Thank you for your patience.
[Introduction] Brand Impersonation Protection for Teams Calling adds proactive safeguards against fraudulent or deceptive external callers who attempt to appear as trusted organizations. This helps reduce social-engineering risks and improves tenant security when users receive first-contact external calls. This update aligns with Microsoft's ongoing investments in caller identity protection and secure collaboration. This message is associated with Microsoft 365 Roadmap ID 543239. [When this will happen:] Targeted Release: Rollout will begin mid-March 2026 (previously mid-February) and is expected to complete by late March 2026 (previously late February). General Availability: Timelines will be communicated in a future message. |
| 2026-01-28 | MC Title | Brand impersonation protection for Teams Calling | (Updated) Brand impersonation protection for Teams Calling |
| 2026-01-28 | MC End Time | 04/01/2026 09:00:00 | 2026-04-27T09:00:00Z |
Last updated 2 weeks ago ago
