Claude in Excel and PowerPoint Now Works Through an LLM Gateway: What Changed and How to Set It Up
Anthropic published support documentation on March 11, 2026 confirming that Claude's add-ins for Microsoft Excel and PowerPoint can now connect through an LLM gateway. An LLM gateway is a routing layer that many companies place between employees and AI services so that IT and security teams can control access, monitor usage, and manage costs in one place. Before this change, organizations that required all AI traffic to pass through a gateway could not easily roll out Claude inside Excel and PowerPoint. Now they can: an administrator points the add-ins at the company's gateway address instead of connecting directly to Anthropic. For everyday users, nothing about the Claude experience inside Excel or PowerPoint changes — the difference is that your company's IT team can now approve and deploy it under their existing controls.
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