Microsoft Flow SharePoint to Teams HTTP 413
问题 I have a Microsoft Flow which pulls a SharePoint List item and it's attachments, creates a message, then sends that message to Teams through a Webhook connector. In order to send the attachments, I am required to send the Base64 representation. I believe this is making the message too large, as I am receiving HTTP 413 response. The message I am sending is correct (I tested it in the Actionable Message playground), but it's the connection (HTTP POST to Teams) which is failing. Please help me