Trigger phone call (tel or sip) using Action.OpenUrl in Adaptive Card in Microsoft Teams

Question

I am working on an adaptive card that is posted to users in Teams using Power Automate. The final thing I would like to add to the adaptive card, is a action button, that the user can click to call a person.

I have tried using both tel and sip in the URL. However nothing happens when the button is clicked.

Is this a limitation of Teams - or am I just doing it wrong?

"actions": [
    {
        "type": "Action.OpenUrl",
        "title": "Call Matt",
        "url": "tel:+4599999999",
        "id": "callMeId"
    }
]

Adaptive Card Designer

BR, Niels

Answer 1

You need to set the Microsoft Teams as default Apps for Tel Protocol.

You can try putting following in browser: +46890510 it will navigate you to the Microsoft Teams

it will open one pop up for Teams asking to call or not