Tessian incident

Degraded Live Syncing Performance

Resolved after 2 days 23 hours, affecting Core Email Protection API and M365 Add-in and 1 more, on July 28, 2026.

monitoring Jul 28, 2026, 06:51 PM UTC

As of 18:18 UTC, all systems are operating within expected limits. Our teams remain actively engaged in monitoring the environment. We appreciate your patience and understanding. If you have further questions or concerns, we'd encourage you to open a Support Case for further assistance.

Started
Jul 28, 2026, 02:24 PM UTC
Resolved
Jul 31, 2026, 01:58 PM UTC
Duration
2d 23h
Detected by Pingoru
Jul 28, 2026, 02:24 PM UTC

Affected components

Core Email Protection APIM365 Add-inCore Email Protection APIAEDLP Email Misdelivery ProtectionAEDLP Email Exfiltration Protection

Update timeline

  1. identified Jul 28, 2026, 02:24 PM UTC

    We are currently investigating an issue causing delays in live syncing. As a result Email Misdelivery, Exfiltration Protection and Core Email Protection API may experience reduced classification accuracy. Additionally, Core Email Protection API checks are experiencing delays which may result in some missed flags. Our engineering team is actively working to identify the root cause and restore normal service. We will provide further updates as more information becomes available.

  2. monitoring Jul 28, 2026, 06:51 PM UTC

    As of 18:18 UTC, all systems are operating within expected limits. Our teams remain actively engaged in monitoring the environment. We appreciate your patience and understanding. If you have further questions or concerns, we'd encourage you to open a Support Case for further assistance.

  3. resolved Jul 31, 2026, 01:58 PM UTC

    After continued monitoring, for the last 48 hours all systems remain stable.

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