Utilize Windows Service for Sending ChatMessages to a Microsoft Teams Channel.

Question

Hi,

I am currently exploring the feasibility of using MS Teams as an endpoint for our company's product offerings. I have a query regarding Application Permissions.

Our objective is to utilize a Windows Service to post ChatMessages to a specific MS Teams Channel periodically. After conducting research and prototyping, I have found that listing channels, adding channels, and listing teams, etc., all function seamlessly from the Windows Service using Application Permissions, which means no logged-in interactive user is required.

However, it seems that sending a ChatMessage to a Channel is only possible by using Delegated Permissions, which necessitate a logged-in interactive user.

Could you please confirm whether it is accurate that there is no means for a Windows Service utilizing Application Permissions to transmit ChatMessages to a Channel?

Thank you for your help.

Best regards,

Nikita

AISCreen, Inc.
https://www.aiscreen.io/

Answer 1

Currently sending a ChatMessage to a Channel is only possible by using Delegated Permissions.
Application permissions are only supported for migration for Sending ChatMessages to a Microsoft Teams Channel.

Ref Doc: https://learn.microsoft.com/en-us/graph/api/channel-post-messages?view=graph-rest-1.0&tabs=http