Outlook Calendar

Create, update, delete, and list events in Microsoft 365 (Outlook) calendars via Microsoft Graph API. Includes a scheduling assistant to find available meeting slots.

Authentication

Auth type: OAuth 2.0 (client credentials or delegated) Register an app in Azure Portal → App registrations. Grant Calendars.ReadWrite and OnlineMeetings.ReadWrite permissions.

Credential	Description
Access Token	Microsoft Graph API access token

Triggers

Trigger	When it fires
Event Created	A new calendar event is created
Event Updated	An event’s details change
Event Cancelled	An event is cancelled
Meeting Response Received	An attendee accepts, declines, or tentatively accepts

Actions

Events

Action	Key inputs	Key outputs
Create Event	`subject`, `body`, `startDateTime`, `endDateTime`, `attendees[]`, `location`, `isOnlineMeeting`	eventId, webLink, onlineMeetingUrl
Get Event	`eventId`	eventId, subject, start, end, attendees[], status
Update Event	`eventId`, `subject`, `startDateTime`, `endDateTime`, `body`	eventId, webLink
Delete Event	`eventId`	deleted
List Events	`startDateTime`, `endDateTime`, `top`	events[], count

Response & scheduling

Action	Key inputs	Key outputs
Respond to Meeting	`eventId`, `response` (accept/decline/tentativelyAccept), `comment`	success
Get Scheduling Availability	`attendees[]`, `startDateTime`, `endDateTime`, `durationMinutes`	suggestions[]

Last modified on April 2, 2026