Issue with GraphAPI Uploads to Teams-Associated SharePoint and Viewer Error

Meghana-MSFT 

Hello.
I still have a problem with it.

After uploading to the share point, we can get DriveItem resource from GraphAPI which has `eTag` property.
https://learn.microsoft.com/en-us/graph/api/resources/driveitem?view=graph-rest-1.0

As a next step, we want to send message to Teams with attachments.
We were following the example above.
Example 3: Send a message containing cards
https://learn.microsoft.com/en-us/graph/api/chatmessage-post?view=graph-rest-1.0&tabs=http#example-3-send-a-message-containing-card

We generated unique uuid by ourselves and add it to the id property with request.
I also checked that I added `eTag` associated with DriveItem to the id property but it didn't work.

POST https://graph.microsoft.com/v1.0/teams/fbe2bf47-16c8-47cf-b4a5-4b9b187c508b/channels/19:4a95f7d8db4c4e7fae857bcebe0623e6@thread.tacv2/messages
Content-type: application/json

{
    "subject": null,
    "body": {
        "contentType": "html",
        "content": "<attachment id=\"74d20c7f34aa4a7fb74e2b30004247c5\"></attachment>"
    },
    "attachments": [
        {
            "id": "74d20c7f34aa4a7fb74e2b30004247c5",
            "contentType": "application/vnd.microsoft.card.thumbnail",
            "contentUrl": null,
            "content": "{\r\n  \"title\": \"This is an example of posting a card\",\r\n  \"subtitle\": \"<h3>This is the subtitle</h3>\",\r\n  \"text\": \"Here is some body text. <br>\\r\\nAnd a <a href=\\\"http://microsoft.com/\\\">hyperlink</a>. <br>\\r\\nAnd below that is some buttons:\",\r\n  \"buttons\": [\r\n    {\r\n      \"type\": \"messageBack\",\r\n      \"title\": \"Login to FakeBot\",\r\n      \"text\": \"login\",\r\n      \"displayText\": \"login\",\r\n      \"value\": \"login\"\r\n    }\r\n  ]\r\n}",
            "name": null,
            "thumbnailUrl": null
        }
    ]
}