Connect Outlook to Slack

Accept calendar event invite

Accepts or tentatively accepts a calendar meeting invite on behalf of a user. Use this action when a user has received a meeting invitation and wants to indicate their attendance status (either confirmed or tentative). The organizer will...

Add event attachment

Adds an attachment to a specific Outlook calendar event. Use when you need to attach a file or nested item to an existing event.

Add mail attachment

Tool to add an attachment to an email message. Use when you have a message ID and need to attach a small (<3 MB) file or reference.

Batch move messages

Batch-move up to 20 Outlook messages to a destination folder in a single Microsoft Graph $batch call. Use when moving multiple messages to avoid per-message move API calls.

Batch update messages

Batch-update up to 20 Outlook messages per call using Microsoft Graph JSON batching. Use when marking multiple messages read/unread or updating other properties to avoid per-message PATCH calls.

Create Calendar Event

Creates a new Outlook calendar event, ensuring `start_datetime` is chronologically before `end_datetime`.

Add call participants

Registers new participants added to a Slack call.

Add emoji

Adds a custom emoji to a Slack workspace given a unique name and an image URL; subject to workspace emoji limits.

Add an emoji alias

Adds an alias for an existing custom emoji in a Slack Enterprise Grid organization.

Add Enterprise user to workspace

Adds an Enterprise user to a workspace. Use when you need to assign an existing Enterprise Grid user to a specific workspace with optional guest restrictions.

Add reaction to message

Adds a specified emoji reaction to an existing message in a Slack channel, identified by its timestamp; does not remove or retrieve reactions.

Add a remote file

Adds a reference to an external file (e.g., Google Drive, Dropbox) to Slack for discovery and sharing, requiring a unique `external_id` and an `external_url` accessible by Slack.