Hello community,

I'm trying to mention a user when creating a post in a Teams channel using ChatOps.

Using https://learn.microsoft.com/en-us/microsoftteams/platform/task-modules-and-cards/cards/cards-format?tabs=adaptive-md%2Cdesktop%2Cconnector-html#microsoft-entra-object-id-and-upn-in-user-mention, I managed to create this:

var adaptiveCardBody = new List<AdaptiveElement>()
{
new AdaptiveTextBlock("Hello <at>Mauro Druwel</at>")
{
Wrap = true,
AdditionalProperties = new AdaptiveCards.SerializableDictionary<string, object>
{
{
"msteams", new
{
entities = new List<object>
{
new
{
type = "mention",
text = "<at>Mauro Druwel</at>",
mentioned = new
{
id = "mauro.druwel@skyline.be",
name = "Mauro Druwel",
},
},
}
}
},
},
},
};

This should tag the user; unfortunately, it is not working. How can I resolve this?