Three panes if the “Restrict Chats to Only Students and Teachers” is enabled.
1.) A course pane so that the teachers could send messages to all students who are enrolled in a course like a classroom’s group or similar.
2.) A student’s pane who shows ONLY the students that has to interact with the creator/additional teachers (like the new conversation’s pane) and where creators/teachers can reply and see the conversation.
3.) A Student’s pane (or similar) where the creator/additional teachers can choose a student (grouped by course) they would like to interact with.
In simple words, the creators and additional teachers must be “considered” as a single endpoint for a student’s conversation.
When a student sends a message to a “course” it must be received from both creators and teachers so that everyone could reply and interact and see the thread.