Microsoft Teams Bot : Messaing Endpoint not being used

Question

Context

• I'm trying to use Bot Framework REST APIs (https://learn.microsoft.com/en-us/azure/bot-service/rest-api/bot-framework-rest-overview?view=azure-bot-service-4.0) to build a MS Teams bot.

  Issues

  • Messaging endpoint is displayed to be saved with a green checkmark. However, the previous endpoint is still being used. The new endpoint just got saved on, but is never used. Please see screenshot below for more info:

• As a result, my Bot never receives anything from my Bot connector (i.e. when I send 1-1 message to my bot, my bot server never receives the POST message)

  Questions

• This is quite hard to debug, since the endpoint gets saved with a green checkmark. There is absolutely no error message. Is there any way that I can see the error message on why the new endpoint does not get registered properly? Do we have log for this? Seeing the error would help me solve this issue much faster.
• Could you help explain the requirements for a new endpoint to be registered as a new messaging endpoint.
  

  My attempts

• I added ['https://teams.microsoft.com/', 'teams.microsoft.com', 'https://login.microsoftonline.com', 'https://smba.trafficmanager.net/', 'smba.trafficmanager.net'] to the IP allowlist that my server can communicate with. However, the issue is still there.
• I tried using other urls with ngrok. The url provided by ngork is able to work with the Bot connector - I tried this example https://github.com/microsoft/BotBuilder-Samples/blob/main/samples/csharp_dotnetcore/56.teams-file-upload/README.md. This confirmed that I set up my Bot connector properly. Something is likely wrong on my Bot server.
• I'm able to use Postman to send POST requests to my Bot servers. It's just the messaging endpoint that results in 0 log.

Answer 1

Updates

• On updating the messaging endpoint of Bot. I noticed that a new request gets sent on Teams. However, the Bot connector does not send anything to my Bot server...
• I feel like Bot connector determines that my ur is invalid and never send any request to my Bot server.