This connects to Microsoft's Agent365 platform to give Claude direct calendar management capabilities through streamable HTTP. You get the full suite of operations: creating and updating events, deleting them, sending invites, and querying availability across calendars. It's tenant-scoped, so you'll need your Microsoft tenant ID in the remote URL. Reach for this when you want Claude to handle scheduling workflows without bouncing users to Outlook or Teams. The source repository is fairly locked down behind Microsoft EMU authentication, but the MCP interface itself is straightforward calendar CRUD plus availability checks.