Are Channel Mentions supported via Incoming Webhook Connectors?

Question

Hey!

TL:DR: While posting to Incoming Webhook Connectors messages with @mentions of a Channel ID, the message goes through but the mentioned channel is not linked to anything and doesn't trigger notifications to users of that channel.

I have used relevant Dev Docs to send messages with Adaptive Cards against Incoming Webhook Connectors (dev docs: https://learn.microsoft.com/en-us/microsoftteams/platform/task-modules-and-cards/cards/cards-format?tabs=adaptive-md%2Cconnector-html#user-mention-in-incoming-webhook-with-adaptive-cards)

The solution works for Ms Team Users but as soon as I move to Channel Ids it is not working as expected - as in the notifications are not send and the channel name is not a pseudo link I could hover over to see some details.

This link shows how I'm getting the channel id: https://www.c-sharpcorner.com/blogs/how-to-fetch-the-teams-id-and-channel-id-for-microsoft-teams

sample msg:

    {  
        "type": "message",  
        "attachments": [  
            {  
            "contentType": "application/vnd.microsoft.card.adaptive",  
            "content": {  
                "type": "AdaptiveCard",  
                "body": [  
                    {  
                        "type": "TextBlock",  
                        "size": "Medium",  
                        "weight": "Bolder",  
                        "text": "ALERT TITLE"  
                    },  
                    {  
                        "type": "TextBlock",  
                        "text": "Hi , this is the actual msg"  
                    }  
                ],  
                "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",  
                "version": "1.0",  
                "msteams": {  
                    "entities": [  
                        {  
                            "type": "mention",  
                            "text": "",  
                            "mentioned": {  
                              "id": "NORMALLY I HAVE AN ID# HERE",  
                              "name": "General"  
                            }  
                          }  
                    ]  
                }  
            }  
        }]  
  
}  

Answer 1

We got the below response from the engineering team -

Currently only user mention is supported in Incoming webhook. In general, mentioning a channel via payload is not supported yet in both Incoming Webhook and Bot.

Thanks,
Meghana

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Answer 2

Have a look at this here, this guy seems to have got it working. I can't get it working though, just shows as plain text with no notifications.

https://powerusers.microsoft.com/t5/Building-Flows/Channel-Teams-mention-in-Adaptive-Cards/m-p/1444535/highlight/true#M162055