### Answer The available sources don't provide specific documentation on integrating Retell AI directly with Microsoft Outlook for pushing appointment data. However, based on the sources, here are the general approaches for calendar integrations with Retell AI: 1. **Custom Tool/Function Integration**: You can create a custom tool that connects to external APIs (like Microsoft Outlook/Graph API) to schedule meetings. [(1) ]() 2. **Automation Platforms**: Users have successfully used platforms like Make.com to connect Retell AI with calendar systems, passing variables like name, email, and appointment details through the automation workflow. [(2) ]() 3. **Cal.com Integration**: Retell AI has built-in support for Cal.com booking, though users have noted the built-in function has limited functionality—for more options, a custom tool integration is recommended. [(3) ]() For Outlook specifically, you would likely need to: - Build a custom function/tool that calls the Microsoft Graph API - Or use an automation platform (Make.com, Zapier, n8n) as middleware between Retell and Outlook Check out these potentially useful sources: - [5 Useful Prompts for AI Agent Builders]() - [7 Personalization Tactics That Boost Call-to-Booking Rates]() Would you like a general answer on how to approach building a custom Outlook integration?

​ To learn more, see the sources I considered: [[1] 5 Useful Prompts for AI Agent Builders | Retell AI](https://www.retellai.com/blog/5-useful-prompts-for-building-ai-voice-agents-on-retell-ai) [[2] booking appointment cal.com node error](https://discord.com/channels/1186424376300679209/1400861711405420644) [[3] calendar appointment booking through retell](https://discord.com/channels/1186424376300679209/1250814023067500657) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.