Forum Discussion

Brass Contributor

Mar 13, 2025

Microsoft.Bot.Connector SendToConversationAsync Failed - 'Forbidden'

Hi. We use Microsoft.Bot.Connector (4.22.9) SendToConversationAsync for sending an activity to a conversation. Most of them are processed successfully, but some fail with 'Operation returned an...

Brass Contributor

Mar 20, 2025

So, the example shows retry mode.

But ... What is my mistake (code above, MessageActivity)?

Most of them are processed successfully, but some fails with 'Operation returned an invalid status code 'Forbidden'.
How can I handle it? What is the reason?
Also, I have a second question about "block bot conversation."

If the user blocks the conversation, I think SendToConversationAsync will fail, too. How can I handle this, and what kind of error will be raised?

Sayali-MSFT
Microsoft
Mar 24, 2025
Could you please check your configurations and verify that your ServiceURL is still valid or changed.

The ServiceUrl in the ConversationReference can change. Always use the latest ServiceUrl provided in the incoming activity when responding to a user.

For further information on this please refer this sample:Microsoft-Teams-Samples/samples/bot-conversation/csharp/Bots/TeamsConversationBot.cs at main · OfficeDev/Microsoft-Teams-Samples (github.com)