How to obtain phone number from an unanswered incoming call

jimbycat -It seems that extracting the phone number from an incoming call on Teams in real-time using the Graph API is currently not possible. The Graph API does not support real-time notifications for incoming calls with phone numbers.

You can create a bot that interacts with Teams calls and meetings using real-time voice, video, and screen sharing. This bot can receive call data such as the phone number and call start time. To achieve this, you need to use the Microsoft Graph APIs for calls and online meetings.

If you need real-time data, creating a bot might be the most viable solution.