A developer has built a working integration that gives Claude direct access to a full Microsoft 365 account - including email, calendar, OneDrive, Planner, Excel, and Word - using Power Automate and a small custom MCP server.
MCP (Model Context Protocol) is a standard that lets AI assistants connect to external apps and data sources. Most MCP demos stay narrow - one database, one API. This one wires Claude into the full M365 suite through Power Automate, Microsoft's built-in workflow automation tool, which means no third-party API credentials are needed beyond what you already have through your Microsoft account.
The integration handles seven task types: reading your inbox, drafting and sending follow-up emails, checking your calendar, saving notes to OneDrive, creating Planner tasks, writing rows into Excel, and filling Word templates. That covers most of what a personal assistant would handle on a typical workday.
The practical value is the M365 angle specifically. Most Claude integrations target Google Workspace or Slack. For people whose work lives inside Teams, Outlook, and SharePoint, this fills a real gap without requiring an ecosystem switch.
The setup uses Power Automate as the middleware layer - Claude talks to the MCP server, which triggers Power Automate flows, which talk to M365. It adds a step in the chain, but it also means you can control what Claude can and can't access by editing flows in Power Automate rather than touching any code.
The builder described crossing the line from "cool demo, never use again" into something they actually reach for - which is a meaningful bar. Most MCP integrations still sit on the wrong side of it.