# Anthropic: Degraded performance on Claude for Microsoft Office 365

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-09-01 16:02 UTC · Resolved: 2026-09-01 16:22 UTC · Duration: 20 min
- Updates: 2 · Affected components: claude.ai
- [Vendor status page: https://stspg.io/k8bzm26b6sy9](https://stspg.io/k8bzm26b6sy9)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Part of an outage event

- [Google Cloud us-central1 outage, Sep 1, 2026: 47 vendors, 54 incidents](https://rewindex.com/events/2026-09-01-google-cloud-us-central1)
- This incident started in the same window without naming Google Cloud (timing only, not evidence of a link). (timing only, posted +1 h 21 min vs Google Cloud’s own post)

```mermaid
flowchart LR
  root["Google Cloud us-central1<br/>posted 14:42 UTC"]:::root
  h1["Within an hour<br/>8 vendors, 8 blamed Google Cloud<br/>Pinecone, Elastic Cloud, FullStory +5"]:::blames
  root --> h1
  h4["1 to 4 hours later<br/>6 vendors, 6 blamed Google Cloud<br/>Apollo GraphQL, Temporal Cloud, Clerk +3"]:::blames
  root --> h4
  p0["GitHub<br/>posted +18 min, did not name Google Cloud"]:::timing
  root -.-> p0
  k0["Bolt.new<br/>+24 min"]:::hop2
  p0 -->|"blamed GitHub"| k0
  p1["Twilio<br/>posted +1 h 42 min, did not name Google Cloud"]:::timing
  root -.-> p1
  k1["Gorgias, Iterable<br/>+2 h 23 min to +2 h 37 min"]:::hop2
  p1 -->|"blamed Twilio"| k1
  me["Anthropic (this incident)<br/>posted +1 h 21 min"]:::me
  root -.->|"same window"| me
```

_Detected automatically from incidents that started together and named the same provider; a link means one incident named another vendor, not a confirmed cause._

## Timeline of updates

- **investigating** 2026-09-01 16:02 UTC: We are investigating elevated errors affecting Claude for Microsoft Office 365. We will provide an update as soon as possible.
- **resolved** 2026-09-01 16:22 UTC: This issue has been resolved.


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Canonical: https://rewindex.com/company/anthropic/incidents/nr3h7bw8b3k3 · Markdown: https://rewindex.com/company/anthropic/incidents/nr3h7bw8b3k3.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/nr3h7bw8b3k3 · Generated 2026-10-19T23:16:59.970Z