Network: UK-MICROSOFT-20060601

This network has contributed 1,071 unique IP addresses across 6,575 failed authentication events, accounting for 13,621 messages. Activity spans from March 12, 2024 to May 16, 2026, with peak volume in September 2025 (3,443 events). The top countries by failure volume are United States (94%), Japan (2%), Ireland (1%). The most active source IPs from this network include 2a01:111:f403:c112::5 (360 failures), 2a01:111:f403:c110::1 (352 failures), 2a01:111:f403:c001::2 (348 failures). Failures from UK-MICROSOFT-20060601 (Microsoft) span 18 countries with no dominant source, which is consistent with forwarding infrastructure, relay services, or broadly distributed automated activity.