Microsoft 365 MCP Integration

Weldable's Microsoft 365 MCP integration gives your AI agents access to Outlook, Teams, OneDrive, and the full suite of Office services through a single connection. Your agent can read and send emails, manage calendars, search files, and post to Teams channels using natural language, all backed by the Microsoft Graph API.

Microsoft has introduced its own MCP Server for Enterprise (in preview), signaling that agent-driven access to Microsoft 365 data is becoming a first-class capability. Weldable connects to the same Microsoft Graph API surface, handling OAuth token management and multi-service routing so your agent can work across Outlook, Teams, OneDrive, and SharePoint in a single workflow.

Use cases

Email triage and response

Your agent scans your Outlook inbox for unread messages, categorizes them by sender and subject, and presents a prioritized summary. Routine emails (meeting confirmations, newsletter digests, automated notifications) get tagged and archived. Messages that need a reply get flagged with suggested response points. Your agent can also draft and send replies for templated communications like status updates or meeting follow-ups.

Cross-service meeting preparation

Before a scheduled meeting, your agent pulls the agenda from the calendar event, searches OneDrive for the relevant documents referenced in the invite, and posts a pre-read bundle to the Teams channel. If the meeting has action items from the previous session (stored in a OneNote or Teams message), the agent includes those too. Everyone walks into the meeting with context already assembled.

Teams channel automation

Your agent posts structured updates to specific Teams channels on a schedule or in response to triggers. A Monday morning post to #engineering with the week's deployment schedule. A Friday afternoon summary in #sales with pipeline updates pulled from Google Sheets. A real-time alert to #incidents when a monitoring system detects an issue. Each message goes to the right channel with proper formatting.

File search and document routing

Your agent searches across OneDrive and SharePoint for documents by name, content, or metadata. When someone asks "find the latest version of the brand guidelines," the agent returns a direct link. It can also move or copy files between folders, share documents with specific people, and upload new files to the correct library.

Calendar coordination

Your agent checks availability across multiple attendees, finds open time slots, and creates calendar events with the right details: title, location (or Teams meeting link), agenda, and attendee list. It handles rescheduling by finding alternative slots and updating all attendees. For recurring meetings, it can pull attendance patterns and flag meetings that consistently have low turnout.

How it works

Connect your Microsoft 365 account through Weldable's OAuth flow using your organizational credentials. Weldable requests Microsoft Graph API scopes for the services your agent needs: Mail.ReadWrite for email, Calendars.ReadWrite for scheduling, Files.ReadWrite for OneDrive, and ChannelMessage.Send for Teams. Tokens refresh automatically.

Once connected, describe what you need in plain English. Say "send a reply to John's email about the Q2 forecast" or "find all PowerPoint files modified this week in the Marketing folder" and Weldable translates your intent into the appropriate Graph API calls. Your agent handles the routing between Outlook, Teams, OneDrive, and other Microsoft 365 services behind the scenes.

Tips

Be specific about which service you mean. Microsoft 365 covers many products under one umbrella. Saying "search for the budget file" is ambiguous. Saying "search OneDrive for the Q4 budget spreadsheet" gives the agent a clear target. Include the service name (Outlook, Teams, OneDrive, SharePoint) in your request.

Use delegated permissions, not application permissions. Microsoft Graph supports both delegated (user-scoped) and application-level permissions. Delegated permissions are safer for most workflows because the agent only accesses data the authenticated user already has access to. Application permissions bypass user-level access control and require admin consent.

Teams channel names must be exact. When posting to Teams, provide both the team name and channel name exactly as they appear in the Teams UI. Teams does not support fuzzy matching on channel names, and a slight mismatch will cause the post to fail.

Graph API throttling varies by service. Microsoft Graph applies different rate limits to different services. Outlook and OneDrive have separate throttling buckets. If your agent runs a workflow that touches multiple services (read email, search files, post to Teams), the rate limits are evaluated independently. Batch requests where possible to stay within limits.

Calendar time zones need explicit handling. When creating calendar events, always specify the time zone. Microsoft Graph defaults to UTC if no time zone is provided, which can cause meetings to appear at the wrong time for attendees in other regions.