Hi @AlexS
According to our research, the Graph API is currently unable to obtain real-time call notifications (or call IDs), and the call record is available only after the associated call is completed.
To get this feature more quickly, you can send a feedback directly to Microsoft Feedback to add it in future updates.
Many features of our current products are designed and upgraded based on customers’ feedback. With requirements like this increase, the problem may well be released in the future.
Thanks for your understanding and support.
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