Outlook Calendar Scheduling in Microsoft 365

Let agents view, create, and manage calendar events in Microsoft 365 Outlook. Works with shared calendars and room resources via Microsoft OAuth.

On self-hosted OneCLI, Outlook Calendar needs your own Microsoft app first. See Self-hosted.

Overview

OneCLI connects AI agents to Outlook Calendar through Microsoft’s OAuth flow. Agents can list events, create meetings, check availability, and manage RSVPs. The gateway injects OAuth credentials into requests to the Microsoft Graph API automatically.

This is useful for scheduling agents in Microsoft 365 environments that need to coordinate meetings, check availability, or manage calendars.

Setup

1. Go to Connections

   Open the OneCLI dashboard and navigate to Connections > Outlook Calendar.

2. Authorize

   Click Connect Outlook Calendar. You’ll be redirected to Microsoft to sign in and authorize OneCLI. Review the permissions and click Accept.

   

   The Outlook Calendar connect window on OneCLI Cloud.

Self-hosted: use your own Microsoft app

Skip this section on OneCLI Cloud. It’s only for self-hosted OneCLI without MICROSOFT_CLIENT_ID and MICROSOFT_CLIENT_SECRET set. One Microsoft app serves all four Microsoft apps in OneCLI, so you set it up once.

Set up your Microsoft app

Follow Self-hosted: use your own Microsoft app on the Outlook Mail page. If you already have one for another Microsoft app, it already works here. Then open Connections > Outlook Calendar and select Connect Outlook Calendar.

Custom credentials for Outlook Calendar in OneCLI. The Microsoft app is shared, so the same client works here.

What agents can do

• List events on your calendar within a date range
• Get details for a specific event (attendees, location, Teams link, body)
• Create new events with attendees, location, and online meeting settings
• Update existing events (reschedule, modify attendees, change details)
• Delete or cancel events
• Check free/busy availability for one or more users
• Respond to event invitations (accept, decline, tentative)
• List all calendars on the account
• Create and manage calendar groups
• Find meeting times that work for all attendees

Controlling access

Access is per agent: grant the connection to each agent that needs it, choosing per tool what runs freely, what needs human approval, and what stays blocked — a read-only agent is a single grant. Organization rules add guardrails on top, like rate limits and blanket blocks. Everything is checked before credential injection, so a blocked request never reaches Microsoft Graph.