title: Is there a way in Teams to stop people posting to a channel without using a Bot message extension
body: <p>I'm currently creating a Message Extension bot for our escalation channel in Teams and would like it so our company has to use the Bot messaging extension to log escalation issues, this is to help our dev team gather as much information about issues as possible. When other departments log issues straight into the channel important information is sometimes missed out, causing us to lose time asking. Does anyone know a way of achieving this functionality?</p>
  
  <p><img src="https://i.stack.imgur.com/ZmL71.png" alt="Image of the message extension bot"></p>