Microsoft has informed customers of a loss of over two weeks' worth of security logs for certain cloud products due to a bug in its internal monitoring agents. This malfunction, which occurred between September 2 and September 19, has left network defenders without essential data for identifying potential intrusions. The outage, not linked to any security incident, impacted products like Microsoft Entra and Defender for Cloud. Microsoft confirmed the issue was operational and has rolled back service changes. Affected clients may face challenges in detecting unauthorized access during this period.