Microsoft Teams: How can I forward all messages sent to an Incoming Webhook to a Group Chat?

Question

Given:

• I've configured an Incoming Webhook for a Microsoft Teams channel.
• I can use POST calls to programmatically post messages to this channel.

Question:

• I'd like to post these messages to a group chat. How can I do this?
• Can I (or should I) use Power Automate to intercept the messages sent to the Incoming Webhook (or channel) and forward them as is to the group chat?

Answer 1

You should use Power Automate. Teams Connectors are being retired in the next few weeks: https://devblogs.microsoft.com/microsoft365dev/retirement-of-office-365-connectors-within-microsoft-teams/

Here is a working Webhook sent from PowerShell. My application only supports top level JSON keys, so I am using the "text" key:

$WebhookUri = "https://prod-157.westus.logic.azure.com:443/workflows/..."


$adaptiveCardJson = @"
{ "type": "messagecard",
  "text": "Test 9" ,}          
"@
Invoke-RestMethod -Method POST $WebhookUri -Body $adaptiveCardJson -ContentType 'application/json'

Here is the Power Automate flow. You would change the "Post in" to "Group Chat".

Power Automate Flow