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Claude for Microsoft 365: Excel, PowerPoint, Word, and Outlook

In brief

On May 7, 2026 Anthropic shipped Claude as add-ins inside Excel, PowerPoint, and Word at general availability, with Outlook in public beta. The headline is cross-app context — assumptions in Excel now propagate into linked PowerPoint slides and Word memos, and an email in Outlook can open straight into a draft in Word.

7 min read·Connectors

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Anthropic shipped Claude for Word as an Office add-in on April 11, 2026. That was a single-app integration: open Word, summon Claude in the sidebar, drop in changes as tracked edits, accept or reject. Useful, but bounded.

The May 7, 2026 release closes the loop on the rest of Office:

  • Claude for Excel — GA
  • Claude for PowerPoint — GA
  • Claude for Word — GA (was beta from April)
  • Claude for Outlook — public beta

The interesting piece is not that all four apps now have a Claude sidebar. It is that they share context.

What "cross-app context" actually does

The four add-ins share a single conversation thread per Microsoft 365 user. When you talk to Claude in Excel about a financial model, then open the PowerPoint deck where that model lives, Claude knows what assumptions you just changed. When you change a number in Excel, the linked sentence in the Word memo updates with it.

A concrete walk-through from the launch post:

  1. Outlook surfaces an email from a customer raising a billing question.
  2. You ask Claude to triage. Claude opens the attached invoice in Word and drafts a response memo using the relevant pricing terms from your Excel rate sheet.
  3. The email reply is staged in Outlook with the right recipients and the memo attached.

Each step is something Claude could already do app-by-app. The new behavior is: state carries across apps without copy-pasting context every time.

What's actually in each add-in

Excel. Build sheets from a description; explain what a complex sheet does; propose formulas; debug broken references; generate charts; pivot the same data into a new analysis. The add-in respects named ranges and links — change a value in a model and dependent sheets, charts, and downstream PPT/Word references update.

PowerPoint. Generate decks from a brief; rewrite slides without breaking templates; reformat content into your company's master; pull updated numbers from the linked Excel without rebuilding the deck. Slide layout follows the active template, not a generic Claude default.

Word. Draft from a prompt; restructure long documents; insert tracked changes you can accept or reject; generate appendix tables from Excel data. Same as the April beta, now GA.

Outlook (beta). Sort the inbox by urgency; draft replies with recipients and subject prefilled; check attendee availability before sending a meeting invite; summarize long threads. The add-in pre-stages a draft — you still hit send.

Plan availability

The add-ins are available on paid plans for Mac and Windows. Outlook is in beta on all paid plans (Pro, Team, Max, Enterprise).

If your org runs Microsoft 365 with admin-controlled add-ins, your IT admin enables Claude for Microsoft 365 from the Microsoft admin center via Microsoft AppSource. End users can't enable it themselves on managed tenants.

What admins get

Three controls worth knowing:

  • OpenTelemetry export. IT can stream prompts and tool calls to a custom collector — useful for audit, not just analytics.
  • Analytics API. Per-user, per-app, per-day activity. Same shape as the existing Claude Code Analytics API, now extended to Office.
  • Gateway routing. Traffic can route through your own LLM gateway to Claude on Amazon Bedrock, Google Cloud Vertex AI, or Microsoft Foundry — useful for orgs that already settled on a deployment surface and don't want a second one.

For larger rollouts, this is the integration that makes a "no shadow AI" position defensible: if Claude lives inside the Office surface your team already uses, you don't need a separate browser tab as the primary surface.

How this compares to Microsoft 365 Copilot

Copilot lives in the same surface (Word, Excel, PowerPoint, Outlook). Practical differences as of this release:

  • Model. Claude add-ins use Claude (Opus 4.7 or Sonnet 4.6 depending on the task). Copilot uses OpenAI's GPT-5.x.
  • Cross-app context. Both products do this. Copilot's is tied to Microsoft Graph; Claude's is tied to a single user thread.
  • Pricing. Copilot is $30/user/month on top of M365. Claude for M365 is included in your Claude paid plan (Pro is $20/month for individuals; Team and Enterprise vary).
  • Models. Microsoft Foundry now also serves Claude models, so an admin can run both Copilot and Claude side-by-side without billing duplication.

The honest read: most teams that have made the M365 + Copilot bet won't switch. Teams that prefer Claude — or want a non-OpenAI model in the same surface for evaluation, redundancy, or output quality — now have a path that doesn't require leaving the Office apps.

What this is not

A few things this release does not do, that the marketing language might suggest:

  • It's not a replacement for Claude Code. The Office add-ins are for documents and email, not source code or terminal work. If your team has been using Claude Code, that flow is unchanged.
  • It's not a connector. The other May add-ins (Granola, Linear, etc.) are connectors — Claude calls them. The Office add-ins are the inverse — Claude is hosted inside Office and calls Office.
  • It's not yet on iOS or Android. Mac and Windows desktop only. Mobile is on the roadmap but not announced.

What to do this week

If you already use Claude:

  1. Enable the four add-ins from your Office app's Add-ins panel (Mac/Windows).
  2. Try the Outlook → Word → Excel → PowerPoint loop on one real task. The cross-app context only matters if you actually use it.
  3. If you're an admin, enable the OpenTelemetry export before users start. Easier to set up clean logging on day one than to retrofit it later.

If you don't use Claude yet but live in M365: this is the lowest-friction first deployment surface. The team doesn't need to learn a new app — Claude shows up in the Office surface they already open.

Source: Collaborate with Claude across Excel, PowerPoint, Word and Outlook, Anthropic blog, May 7, 2026.

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