I'm attempting to create a message in a Teams channel via the Graph API. Teams now supports adaptive cards but it seems we are still limited to either plain text or HTML when creating the message via Graph API (either v1 or beta). Anyone found a way to create this message using Adaptive Cards? https://developer.microsoft.com/en-us/graph/docs/api-reference/beta/resources/itembody
Via Microsoft Graph, no, not yet. But via the Bot Framework APIs, yes, and it's available today.
More info here: https://learn.microsoft.com/en-us/microsoftteams/platform/concepts/cards/cards#cards-in-bots