Adaptive cards aren't rendering on Teams sent from Webhook

NateW345, we tried with below JSON format and the card is rendered correctly. Could you please try this out?

{  
  "type": "message",
  "attachments": [
    {
      "contentType": "application/vnd.microsoft.card.adaptive",
      "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
      "version": "1.3",
      "content": {
         "type": "AdaptiveCard",
    "body": [
        {
            "type": "TextBlock",
            "size": "default",
            "weight": "default",
            "color": "default",
            "text": "Datto"
        },
        {
            "type": "TextBlock",
            "text": "New Datto RMM alert",
            "wrap": true
        },
        {
            "type": "TextBlock",
            "text": "New alert on [device_hostname] [device_description] | [site_name]",
            "wrap": true,
            "size": "Medium",
            "weight": "Bolder"
        },
        {
            "type": "TextBlock",
            "text": "IP address: [device_ip] | Last user: [lastuser]",
            "wrap": true,
            "color": "Dark"
        },
        {
            "type": "FactSet",
            "facts": [
                {
                    "title": "Category:",
                    "value": "[alert_category]"
                },
                {
                    "title": "Description:",
                    "value": "[alert_message]"
                }
            ]
        }
    ],
    "actions": [
        {
            "type": "Action.OpenUrl",
            "title": "New UI View Device",
            "url": "https://[platform]rmm.centrastage.net/device/[device_id]/[device_hostname]"
        },
        {
            "type": "Action.OpenUrl",
            "title": "Old UI View Device",
            "url": "https://zinfandel.centrastage.net/csm/device/summary/[device_id]"
        },
        {
            "type": "Action.OpenUrl",
            "title": "New UI View Alert",
            "url": "https://[platform]rmm.centrastage.net/alert/[alert_uid]"
        },
        {
            "type": "Action.OpenUrl",
            "title": "New UI Web Remote",
            "url": "https://[platform].centrastage.net/csm/remote/rto/[device_id]"
        },
        {
            "type": "Action.OpenUrl",
            "title": "New UI View Site",
            "url": "https://[platform]rmm.centrastage.net/site/[site_id]"
        }
    ]
}
	}
	]
}

Thanks, 

Prasad Das

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