ChatGPT Outlook Plugin is an add-in that integrates ChatGPT, an AI language model developed by OpenAI, into the Outlook email client. This tool enables users to generate email responses based on their prompts directly within the Outlook interface. Key features include custom prompt installation, selective text processing, and automatic email importance updates.

Users can install custom prompts to guide ChatGPT in summarizing emails effectively. The tool allows processing of entire emails or specific sections, offering flexible text processing options. Generated outputs can be displayed separately or replace the original email body for easy comparison. ChatGPT for Outlook also supports managing multiple configurations for various email scenarios, along with the option for businesses to create custom versions for their teams.