As of June 21, 2018, Microsoft Teams for Surface Hub is now in preview for Windows Insiders. https://www.windowscentral.com/microsoft-teams-surface-hub-enters-preview-insiders
An error occurred while saving the commentMichael Bird commented
We are working to integrate webhooks into some custom applications as notifications however many of the json object attributes are not generating the expected rendering as this issue has defined above. I built a simple powershell script to POST to the webhook url and as mentioned certain attributes such as themeColor are not working. Also the potentionalAction attribute won't display a button, just a link. Kind of frustrating since I suspect Teams is getting the correct notification, but it is not being rendered correctly on the client.