Barracuda incident
O365 log ingestion issue impacting some accounts with delay and log degradation alerts.
Resolved after 1 day 11 hours, affecting XDR Service, on September 18, 2026.
Backlogs have been processed and we are verifying recovery is complete
Affected components
Update timeline
- investigating Sep 18, 2026, 03:49 PM UTC
We are experiencing an O365 log ingestion issue impacting some proportion of accounts. The affected customers have not receiving logs for the past 3 days and are seeing log degradation tickets. SRE and Data Engineering teams are actively troubleshooting the issue.
- identified Sep 18, 2026, 06:26 PM UTC
Microsoft had a service issue on Sept-13 under advisory [MO1471241] which caused a backlog of logs. After restoration of MS service, the age and volumes of logs caused complications for XDR backend processing. Processing is now recovering. Affected customers may receive alerts based on older data.
- monitoring Sep 19, 2026, 12:35 PM UTC
Backlogs have been processed and we are verifying recovery is complete
- resolved Sep 20, 2026, 02:51 AM UTC
This incident has been resolved.
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