---
name: "m365_calendar_events"
area: "microsoft365"
title: "Read an Outlook calendar"
price: "free"
method: "POST"
url: "https://api.conecto.chat/v1/tools/m365_calendar_events"
mcp_server: "https://api.conecto.chat/mcp/microsoft365"
auth: "Authorization: Bearer <conecto_sk_ key>"
docs_url: "https://conecto.chat/tools/microsoft365/m365_calendar_events"
---

# Read an Outlook calendar (`m365_calendar_events`)

The events in a mailbox's calendar between two times, in UTC.

The events in a mailbox's calendar between start and end (at most 62 days), in UTC: subject, time, place, organizer, attendees and the Teams link. Free.

Price: Free up to 1,000,000 reads a month for the whole account, then $0.50 per 10,000 reads. A call that fails costs nothing.

## Use it when

Before booking, to find a free slot, or to brief someone on their week.

## Say this to your agent

> What is in the support calendar next week?

## Inputs

| Name | Type | Required | Description | Allowed values | Default |
|---|---|---|---|---|---|
| `mailbox` | string | no | One of the mailboxes the agent may act as; optional when only one is connected. Up to 254 characters. |  |  |
| `start` | string | yes | Up to 40 characters. |  |  |
| `end` | string | yes | Up to 40 characters. |  |  |
| `timezone` | string | no | For start and end without an offset. Up to 60 characters. |  |  |

## Example

Written for Hansen & Voss, a restaurant-equipment wholesaler in Hamburg with 60 staff.

MCP: call `m365_calendar_events` on the MCP server `https://api.conecto.chat/mcp/microsoft365` with these arguments:

```json
{
  "mailbox": "support@hansenvoss.example",
  "start": "2026-10-19T00:00",
  "end": "2026-10-24T00:00",
  "timezone": "Europe/Berlin"
}
```

REST:

```bash
curl https://api.conecto.chat/v1/tools/m365_calendar_events \
  -H "Authorization: Bearer $CONECTO_KEY" \
  -H "Content-Type: application/json" \
  -d '{"mailbox": "support@hansenvoss.example", "start": "2026-10-19T00:00", "end": "2026-10-24T00:00", "timezone": "Europe/Berlin"}'
```

## Response

```json
{
  "call_id": "5f0c8a2e-3b7d-4c1e-9a64-2d8e1f7b0c93",
  "tool": "m365_calendar_events",
  "status": "succeeded",
  "replayed": false,
  "cost_usd": "$0.00",
  "balance_usd": "$19.75",
  "result": {
    "mailbox": "support@hansenvoss.example",
    "events": [
      {
        "id": "AAMkAGI2TG93AAA=",
        "subject": "Test kitchen demo: Sophie Lange",
        "start": "2026-10-24T09:30:00.0000000",
        "end": "2026-10-24T10:15:00.0000000",
        "location": "Test kitchen",
        "organizer": "support@hansenvoss.example",
        "attendees": [
          "sophie.lange@example.com"
        ],
        "online_meeting": null,
        "cancelled": false,
        "link": "https://outlook.office365.com/owa/?itemid=AAMkAGI2TG93AAA%3D"
      }
    ]
  }
}
```

`result`: mailbox; events: each with id, subject, start, end, location, organizer, attendees, online_meeting, cancelled and link.

## Errors

| Code | Status | When | Fix |
|---|---|---|---|
| `not_connected` | 409 | Microsoft 365 isn't connected yet. | Connect it with m365_connect. |
| `not_allowed` | 403 | The mailbox is not one the agent may act as. | Use a connected mailbox; the owner adds one by connecting again. |
| `invalid_input` | 400 | A time is not ISO, or end is not after start, or over 62 days. | Send times like 2026-10-20T14:00 with a timezone. |

The refusals every tool can give (401 key, 402 balance, 429 limits) are on the errors page: https://conecto.chat/docs/errors.md

## Related

- [m365_connect](https://conecto.chat/tools/microsoft365/m365_connect.md): Connects the company's Microsoft 365 through its own app, for the mailboxes the agent may act as. Free.
- [m365_mail_search](https://conecto.chat/tools/microsoft365/m365_mail_search.md): The newest messages in a mailbox folder, or those matching a search. Free up to 1,000,000 reads a month.
- [m365_mail_read](https://conecto.chat/tools/microsoft365/m365_mail_read.md): One message in full, with its body as text and its attachments' names. Free up to 1,000,000 reads a month.
- [m365_mail_send](https://conecto.chat/tools/microsoft365/m365_mail_send.md): Sends an email, or a reply in the same thread, as one of the company's mailboxes. $0.001 a call.
- [m365_calendar_create](https://conecto.chat/tools/microsoft365/m365_calendar_create.md): Adds an event to a mailbox's calendar and invites its attendees, with a Teams link if asked. $0.001 a call.
- [m365_calendar_cancel](https://conecto.chat/tools/microsoft365/m365_calendar_cancel.md): Cancels an event the mailbox organizes and tells its attendees; waits for the owner by default. $0.001 a call.
- [m365_files_search](https://conecto.chat/tools/microsoft365/m365_files_search.md): Files in a mailbox user's OneDrive whose name or words match. Free up to 1,000,000 reads a month.
- [m365_files_read](https://conecto.chat/tools/microsoft365/m365_files_read.md): A OneDrive file's words: text, PDF, Word, Excel or PowerPoint, up to 5 MB. Free up to 1,000,000 reads a month.
- [m365_files_upload](https://conecto.chat/tools/microsoft365/m365_files_upload.md): Writes a text file to a path in a mailbox user's OneDrive; replacing one waits for the owner. $0.001 a call.
- [m365_disconnect](https://conecto.chat/tools/microsoft365/m365_disconnect.md): Forgets the app's secret and the mailboxes; nothing in Microsoft 365 changes. Free.