Tessian incident
Impact of Microsoft Service degradation on Core Email Protection API and Adaptive Email DLP
Ongoing since 05:30 PM UTC, affecting Integrations (Core Email Protection API) and Protection (Core Email Protection API) and 1 more.
Proofpoint is closely following an open Microsoft service incident and measuring the impact on our services. Users may be unable to connect to multiple Microsoft 365 services https://status.cloud.microsoft/ Start time: US 17:30 UTC November 12th 2026 Observed Impact: Proofpoint is receiving errors when calling Microsoft Graph APIs. Any of our services or actions leveraging these calls are currently failing. This has been traced to an open Microsoft incident Core Email Protection API: • Inbound messages are not able to be retrieved for scanning. • Users may be unable to release or delete emails via Adaptive Cards • Admins may be unable to release or delete email via the portal • Proofpoint is unable to move messages to Quarantine, Junk, or inbox folders. AEDLP: • Outbound messages can not be retrieved via API for the Silent Outbound API integration. • Sent emails are unable to be synced to our servers for historical learning. Proofpoint is closely following the Microsoft incident and will update on the full impact once we are able to make successful API calls again.
Affected components
Update timeline
- identified Nov 12, 2026, 07:00 PM UTC
Proofpoint is closely following an open Microsoft service incident and measuring the impact on our services. Users may be unable to connect to multiple Microsoft 365 services https://status.cloud.microsoft/ Start time: US 17:30 UTC November 12th 2026 Observed Impact: Proofpoint is receiving errors when calling Microsoft Graph APIs. Any of our services or actions leveraging these calls are currently failing. This has been traced to an open Microsoft incident Core Email Protection API: • Inbound messages are not able to be retrieved for scanning. • Users may be unable to release or delete emails via Adaptive Cards • Admins may be unable to release or delete email via the portal • Proofpoint is unable to move messages to Quarantine, Junk, or inbox folders. AEDLP: • Outbound messages can not be retrieved via API for the Silent Outbound API integration. • Sent emails are unable to be synced to our servers for historical learning. Proofpoint is closely following the Microsoft incident and will update on the full impact once we are able to make successful API calls again.
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