Microsoft Teams to warn of suspicious traffic with external domains

Microsoft announced a forthcoming Teams security capability, the “External Domains Anomalies Report,” which will analyze external communication trends (spikes, new domains, abnormal engagement) to give admins early visibility into potential data-sharing or security risks, with rollout planned for February 2026 to standard multi-tenant web environments and licensing details TBD; the update also highlights broader Teams security improvements, including malicious link warnings, enhanced protections against risky URLs and files, user options to report false-positive threat flags, automatic screen-capture blocking in meetings, and performance gains via a new desktop call handler.