Auto-Categorize Outlook Emails into Color Categories with GPT-4o

This workflow fetches recent emails from Outlook and uses OpenAI to assign a category (e.g., **Red**, **Yellow**, **Green**). It then updates each message's category in Outlook. --- ## Setup Instructions ### 1. Set Up Outlook Connection 1. In n8n, go to **Credentials > New > Microsoft Outlook OAuth2 API**. 2. Log in with your Outlook account & approve access. 3. Attach this credential to the **Get Messages from Outlook** and **Update Category** nodes in the workflow. 4. (Optional) Adjust the **limit** field in **Get Messages from Outlook** if you want more/less than 5 results. --- ### 2. Set Up OpenAI Connection 1. Go to the **[OpenAI Platform](https://platform.openai.com/api-keys)**. 2. Navigate to **[OpenAI Billing](https://platform.openai.com/settings/organization/billing/overview)**. 3. Add funds to your billing account. 4. Copy your API key into the **OpenAI** credentials in n8n and select it on the **OpenAI Chat Model** and **Categorizing Agent** nodes. --- ## Notes - The agent reads `subject` + `bodyPreview` and returns a JSON category. - The **Update Category** node writes that category back to Outlook. - You can tweak the category names or logic in the **Categorizing Agent** system message. --- ## Contact Need help customizing the categorization rules or routing categories to folders? - **robert@ynteractive.com** - **[Robert Breen](https://www.linkedin.com/in/robert-breen-29429625/)** - **[ynteractive.com](https://ynteractive.com)**