Skype/MS Team REST API not working - microsoft-teams

Question

I'm creating a bot using REST API. Indeed, I want to send a message from my bot to me as following
I start with 'Authentification'
Request:
curl -k -X POST https://login.microsoftonline.com/botframework.com/oauth2/v2.0/token -d "grant_type=client_credentials&client_id={app_id}&client_secret={app_password}&scope=https://graph.microsoft.com/.default"
Response:
{
"token_type": "Bearer",
"expires_in": 3599,
"ext_expires_in": 0,
"access_token": "<access_token>"
}
Next, I start a new conversation
Request:
POST https://skype.botframework.com/v3/conversations
Authorization: Bearer <access_token>
Content-Type: application/json
{
"bot": {
"id": "standupalice",
"name": "Standup Alice"
},
"isGroup": false,
"members": [
{
"id": "<my bot id>",
"name": "Standup Alice"
},
{
"id": "<my user id>",
"name": "Bao"
}
],
"topicName": "News Alert"
}
NOTE: and are obtained from a callback message sent from Skype app to Standup Alice bot.
Response:
{
"id": "<conversation id>"
}
It's weird since the conversation ID is identical to . Well, now I compose a message to send to me as following
Request:
POST https://skype.botframework.com/v3/conversations/<conversation id>/activities
Authorization: Bearer <access_token>
Content-Type: application/json
{
"type": "message",
"from": {
"id": "<my bot id>",
"name": "Standup Alice"
},
"conversation": {
"id": "<conversation id>",
"name": "News Alert"
},
"recipient": {
"id": "<my user id>",
"name": "Bao"
},
"channelId": "skype",
"text": "My bot's reply"
}
Response (http error 400 - bad request):
{
"error": {
"code": "ServiceError",
"message": "The conversationId <conversation id>and bot <my bot id> doesn't match a known conversation"
}
}
Do you have an idea what's wrong with my requests and parameters?
Note 1: I tried to fire request to https://api.botframework.com/v3/conversations as described in https://docs.botframework.com/en-us/core-concepts/overview/#navtitle, but always receives http error 404 - Resource not found.
Note 2: I just tried the same way for webchat and it works fine, but MS Teams doesn't work (http error 500 - Internal Server Error)
Note 3: my channel settings

Answer 1

Your second API request (the one starting a conversation) should have returned something looking like this:
{
"activityId": "string",
"serviceUrl": "string",
"id": "string"
}
The fact that it didn't suggests to me that that's where the problem is (although full disclosure, I wasn't able to re-create it).
Looking at your "members" array, I see you added the bot. I'm not sure, strictly speaking, that a bot is a member (I think members are human, but I can't find a good definition). So, my best suggestion would be to remove the bot from the members array in that second API call.
Good luck!