Add support for application permission to send message in chats
As a third-party security service provider, we need to scan all the messages in chats and send warning messages to inform users when found a phishing URL or malware were sent in chats.
So we need to send messages in a chat by using Application permission since Delegated permission requires that the delegated user is one of the members of that chat.
We wish can use an App to send messages to every existed, or newly created chats in Teams.
Currently the API 'Send chatMessage in a chat' not supports Application way.
Please help to 'Vote' when you see this, thanks~