TeamsBotInstallation.SendMessage - mention a user

[mattphillips]

I'm trying to send a proactive message that mentions a particular user. I'm already able to send adaptive cards via TeamsBotInstallation.SendAdaptiveCard but I just want to send a basic message now. 

Something like "@X, please provide an update". 

I've also managed to send a Mention via ITurnContext.SendActivityAsync but I don't have access to that at the proactive messaging stage.

Any help is appreciated. 

[#2]

@mattphillips  - Teams doesn't support sending proactive messages using email or User Principal Name (UPN).
Ref: Send proactive messages - Teams | Microsoft Learn

Thanks, 

Prasad Das

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