Build a Telegram → Outlook AI Calendar Assistant in n8n

In this tutorial you’ll build a Microsoft Outlook calendar assistant that you can message from Telegram (text or voice). It can create, update, list, and delete calendar events — using an AI agent inside n8n.

What this automation can do

You send a message to your Telegram bot. The workflow routes voice or text, transcribes voice messages, then the AI agent calls Outlook tools to manage your calendar.

1) Telegram setup (BotFather)

• Open Telegram and search @BotFather
• Create a new bot using /newbot
• Copy your Bot Token (keep it private)
• Open your bot chat and send one message (so n8n can receive a test event)

2) Create credentials in n8n

• Create a Telegram credential (paste the bot token)
• Create an OpenAI credential (API key)
• Create a Microsoft Outlook OAuth2 credential (connect your Microsoft account)

3) Import the workflow

• n8n → Workflows → Import from clipboard
• Copy the JSON below and paste it into n8n
• After import: connect the credentials to the correct nodes

4) Outlook permissions (self-hosted only)

If you are self-hosting n8n and connecting Outlook via Azure, ensure Graph permissions allow calendar read/write. Then re-auth your Outlook credential if you changed permissions.

• Common permissions: Calendars.Read, Calendars.ReadWrite, offline_access, User.Read
• Select your calendar in every Outlook node to replace REPLACE_WITH_YOUR_CALENDAR_ID

Workflow JSON (copy or download)

Use Copy to import via clipboard, or Download to import as a file. This template does not include any credentials.