Network: UK-MICROSOFT-20060601

This network has contributed 1,072 unique IP addresses across 6,803 failed authentication events, accounting for 14,188 messages. Activity spans from March 12, 2024 to June 24, 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:c110::1 (380 failures), 2a01:111:f403:c112::5 (379 failures), 2a01:111:f403:c105::7 (369 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.