Hi @VK
Refer - this question is already explained in Q & A. https://learn.microsoft.com/en-us/answers/questions/290448/multicast-option-in-azure.html
Multicast is not supported on Azure. It is going to be blocked by the fabric, which will not route multicast group IP addresses, nor subscribe to different multicast flows. There are numerous scalability challenges to support multicast in the network infrastructure. Given the security implications, we are not likely to support multicast in the near future.
Please refer : https://feedback.azure.com/forums/217313-networking/suggestions/3741233-support-multicast-within-virtual-networks#{toggle_previous_statuses}
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