𝐌𝐢𝐜𝐫𝐨𝐬𝐨𝐟𝐭 𝐢𝐬 𝐫𝐨𝐥𝐥𝐢𝐧𝐠 𝐨𝐮𝐭 𝐚 𝐧𝐞𝐰 𝐄𝐱𝐭𝐞𝐫𝐧𝐚𝐥 𝐃𝐨𝐦𝐚𝐢𝐧𝐬 𝐀𝐧𝐨𝐦𝐚𝐥𝐢𝐞𝐬 𝐑𝐞𝐩𝐨𝐫𝐭 𝐬𝐭𝐚𝐫𝐭𝐢𝐧𝐠 𝐥𝐚𝐭𝐞 𝐅𝐞𝐛𝐫𝐮𝐚𝐫𝐲 2026, 𝐰𝐢𝐭𝐡 𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐢𝐨𝐧 𝐞𝐱𝐩𝐞𝐜𝐭𝐞𝐝 𝐛𝐲 𝐌𝐚𝐫𝐜𝐡 2026.
This powerful report will help you spot suspicious external communication patterns before they become problems.
The report analyzes cross-tenant communication and flags unusual spikes in external engagement. You’ll see detailed insights including which external domains are creating abnormal numbers of 1:1 or group chats with your organization.
𝐖𝐡𝐚𝐭 𝐲𝐨𝐮’𝐥𝐥 𝐬𝐞𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐫𝐞𝐩𝐨𝐫𝐭:
📊 External domain name
📊 Total anomalies detected
📊 New 1:1 chat threads created by that domain
📊 New group chat threads created by that domain
🚫 Direct blocking option for suspicious domains
Where to Find It:
The report will be accessible in the Microsoft Teams Admin Center under Protection reports > Communication anomalies.
You can also set up daily alerts that automatically surface the top 5 domains with unusual activity. Notifications to go directly to a Teams channel for your security team’s immediate visibility.
To activate proactive monitoring, turn on “External domains anomalies alerts” in your Teams Admin Center under Notifications & alerts > Rules.
Message ID: MC1219794