Best way to achieve Conversation view for mail folder using Outlook REST API

Question

I would like to use the Outlook REST API to display the messages in a mail folder and group messages by conversations, like you have in any modern webmail.

For examp

Answer 1

As you've probably realized the REST API doesn't directly provide a way to work with conversations as an entity. This is something that we have on our roadmap to improve.

With the current state of the API what you're describing is basically the right approach. You could possibly defer the second request to "fill in" a conversation until the user selects it.

Answer 2

You can actually use this endpoint to cover both inbox and sentitems

https://outlook.office.com/api/v2.0/me/messages/?$select=ConversationId & $filter=ConversationId eq '${params.conversationId}'