Anthropic incident: Degraded performance on Claude for Microsoft Office 365

Affected components

• claude.ai

1. resolvedSep 1, 2026, 16:22 UTC

   This issue has been resolved.

2. investigatingSep 1, 2026, 16:02 UTC

   We are investigating elevated errors affecting Claude for Microsoft Office 365. We will provide an update as soon as possible.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Anthropic's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

• Elasticsearch: Replication bug causing slow recoveriesMajor · Sep 1, 2026, 08:16 UTC
• Tailscale: Funnel connectivity issuesMajor · Sep 1, 2026, 12:47 UTC
• Pinecone: 5xx errors on some control plane operationsMajor · Sep 1, 2026, 15:04 UTC
• Elasticsearch: Issue impacting services running in GCP us-central1Major · Sep 1, 2026, 15:18 UTC
• Imgix: Increased errors for new render requestsMajor · Sep 1, 2026, 15:30 UTC
• Twilio: SMS Delivery Failures from Twilio to Dukagjjni KosovoMinor · Aug 21, 2026, 16:15 UTC
• Twilio: SMS Delivery Receipt Delays from a Subset of Twilio Phone Numbers to Telefonica El SalvadorMinor · Aug 21, 2026, 21:20 UTC
• Twilio: MMS Delivery Delays from a Subset of Twilio Long Codes to C-Spire United StatesMinor · Aug 26, 2026, 14:48 UTC
• OVHcloud: [EU-SOUTH-MIL][Containers & Orchestration] - Managed Private Registry incident notificationMinor · Aug 26, 2026, 15:00 UTC
• Snowflake: INC20000150Minor · Aug 28, 2026, 00:07 UTC

How often does Anthropic have incidents?

Anthropic reported 85 incidents in the last 90 days, 32 of them major or critical. A typical incident lasted 1h 7m. See Anthropic's uptime and incident history