Need help with configuring Webhook to MS teams

[mallesh.ps]

Hi,

I'm attempting to configure a webhook to deliver notifications to Microsoft Teams, but it's not working as planned for a variety of reasons. The configuration is described below, and when I do the test, it does not throw any errors, however, in teams, it shows as







Please help me to resolve this issue.

 

[tnicholson]

Are you sure that the data and the template are valid? The error sounds a lot like there is something wrong with the JSON.

 

[mallesh.ps]

Are you sure that the data and the template are valid? The error sounds a lot like there is something wrong with the JSON.

To be honest, I'm new to this, and there are no examples for MS teams on the Proxmox site either. Could you help me with the configuration?

 

[andrew-transparent]

I found this tutorial helpful to get started:
https://www.youtube.com/watch?v=lvPXBYlVYG8

 

[mallesh.ps]

I found this tutorial helpful to get started:
https://www.youtube.com/watch?v=lvPXBYlVYG8

Thanks, Andrew. We configured and tested these incoming webhook connectors, and they operate as expected. However, they will be deprecated soon, and I will have to utilize a workflow that I am currently attempting and failing to implement.

 

[andrew-transparent]

I was able to get it to flow by using the sample json for the adaptive card provided in the video link description.

{
    "type": "message",
    "attachments": [
      {
        "contentType": "application/vnd.microsoft.card.adaptive",
        "content": {
          "type": "AdaptiveCard",
          "body": [
            {
              "type": "TextBlock",
              "text": "{{ message }}"
            }
          ],
          "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
          "version": "1.0"
        }
      }
    ]
  }

 

[mallesh.ps]

I was able to get it to flow by using the sample json for the adaptive card provided in the video link description.

{
    "type": "message",
    "attachments": [
      {
        "contentType": "application/vnd.microsoft.card.adaptive",
        "content": {
          "type": "AdaptiveCard",
          "body": [
            {
              "type": "TextBlock",
              "text": "{{ message }}"
            }
          ],
          "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
          "version": "1.0"
        }
      }
    ]
  }

This works with the incoming webhook Office 365 connector which will be deprecated shortly but not with the workflow created using Power Automate.

 

[Tallerik]

Hi, i'm experiencing the same issue when using the Webhook-Workflow from Power-Automate (Created via right-click on channel name -> workflows). Using the now deprecated O365 Connector everything works fine.
From my testing the issue is caused by proxmox (or the http handler) not setting the "Content-Length" header correctly.

Example:



Does not work with the same error in power automate as OP posted.



But if I include "Content-Length" as a header with the correct amount of bytes in the body

the message gets send to the Teams-channel as intended.



Another possible source of this issue could be that the Content-Length is apparently included in the request-body as hex representation ("280"(16) in this case):

If I include a Content-Length header as shown in the second attempt (above) these "280" at the top and "0" at the bottom of the body do not show up

I hope this helps tracking the issue.