MS 365 MCP

MS 365 MCP is a Graph API wrapper that gives Claude direct access to your Microsoft 365 tenant. It ships with over 200 tools spanning Outlook, Teams, SharePoint, Excel, and OneDrive. The breadth is impressive: you can read and send emails, post Teams messages, edit Excel cells, upload files to OneDrive, and query SharePoint lists without leaving your Claude session. I've used it primarily for Outlook triage and Teams notifications. The email tools are genuinely useful for bulk operations: I had Claude flag and move 80-odd invoices into a folder based on sender patterns, which would have been tedious in the web UI. The Teams integration is lighter but functional for posting status updates or reading recent channel messages. Excel support covers cell reads and writes, though complex formulas or pivot tables are outside scope. Authentication runs through Microsoft's device code flow. You authenticate once in a browser, paste the code back, and the server caches your token. It's not frictionless, but it's standard OAuth. The server doesn't store credentials in plaintext, which is the right call for a tool with this much access. Quirks: the tool surface is vast, so Claude sometimes picks the wrong endpoint or misinterprets what you want. You'll occasionally need to be explicit about whether you mean 'inbox' or 'sent items'. The server also assumes you know your Microsoft 365 structure: it won't guess your SharePoint site URL or OneDrive folder paths. If you're not already comfortable with Graph API concepts, expect a learning curve. This is a power tool for people who live in Microsoft 365 and want to automate repetitive admin work. If you're managing multiple inboxes, coordinating Teams channels, or doing regular Excel updates, it's worth the setup friction. If you only check email twice a day or don't have an M365 subscription, skip it. The value is in bulk operations and cross-service workflows, not one-off tasks you could do faster in a browser.