Hello @Digvijaysinh Zala to retrieve a list of replies, you can use the
conversationId property of the message resource. You can do this by filtering by the conversationId on the initial message, this will respond with a set of replies:
https://graph.microsoft.com/v1.0/me/messages?$filter=conversationId eq 'conversationId'
Graph will respond with all the messages in the thread, I've selected just the id and conversationId in the sample below:
Let me know whether this helps and if you have further questions,