I have a requirement that my bot should receive a notification from an external system and then it needs to send notification to Teams' logged in user's activity feed.
I followed https://github.com/microsoft/BotBuilder-Samples/tree/master/samples/csharp_dotnetcore/16.proactive-messages, it works on emulator. I deployed above app on on-premise IIS server (with https support) and then registered on https://dev.botframework.com/ by providing botid generated through MSTeams App builder. Now, when I sideloaded this bot in MS Teams, it does not send proactive message.
I am new to Bot framework hence steps by steps instructions and sample code will be much appreciated.