Use the right account and administrative setup
A personal Outlook or Hotmail account is not sufficient for this connector. Anthropic describes a Microsoft 365 work account with an Entra tenant and administrative consent before personal connection. Team and Enterprise also require enablement by the Claude organisation. Establish these prerequisites before planning a business pilot.
Review user permissions and write tools separately
The connector uses delegated permissions, so existing oversharing remains a separate issue. Assess reading and analysis separately from enabled write tools. The documented email write tools currently do not support attachments. For each operation, record destination, identity and acceptance; claims from a Copilot configuration do not automatically apply.
Test a project briefing with two roles
Choose approved project documents and create an internal status draft with references. Review it with the project lead. Repeat the test with a role that must not see certain documents. Add external email or file modification only as a separate test. This reveals both professional quality and the access actually permitted.
Decision matrix
| Decision point | Proceed when | Stop when |
|---|---|---|
| Access and data path | Documented: connector permissions, data classes, storage, drafts and human approval. | Scope, data or accountability remains unresolved. |
| Connection under test | A bounded test establishes which Microsoft 365 content is accessible, where the result is stored and where a person approves further use. Excluded content remains excluded. | There is only an unevaluated demo without acceptance evidence. |
| External effect | Owner, approval, fallback and next review date are defined. | Avoid: treating Copilot and Claude permissions or data commitments as equivalent. If connector permissions, data commitments or storage destinations are inferred solely from another provider integration, the review baseline for this workflow is missing. |
Keep it verifiable
Primary sources
- Anthropic: Connect to Microsoft 365Source checked:
- Anthropic: Microsoft 365 connector security guideSource checked:
