MC1219794 | (Updated) Microsoft Teams: External domains anomalies report

Service

Microsoft Teams

Last Updated

2026-05-13T18:11:29.567Z

Published

2026-01-21T00:39:21Z

Message ID

MC1219794

Updated March 27, 2026: We have updated the timeline. Thank you for your patience. [Introduction] To help admins detect unusual or potentially risky interactions with external organizations, Microsoft Teams is introducing the External domains anomalies report. This report analyzes cross-tenant communication patterns for your tenant and highlights sudden spikes or abnormal engagement activity. These insights support proactive investigation and help protect your organization while enabling secure external collaboration. This message is associated with Microsoft 365 Roadmap ID 536572. [When this will happen] • General Availability (Worldwide): Rolling out in mid-May 2026 (previously early April...

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