Network: UK-MICROSOFT-20060601

This network has contributed 1,070 unique IP addresses across 6,475 failed authentication events, accounting for 13,416 messages. Activity spans from March 12, 2024 to April 10, 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 (347 failures), 2a01:111:f403:c110::1 (346 failures), 2a01:111:f403:c001::2 (343 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.