We ran a virtual training through Canvas and Big Blue Button for teachers. We sent out invites and had some teachers attend. Some of the teachers were unable to see the conference we have provided. *all were invited. Somehow teachers (listed as student roles) were able to create another conference and could not see ours. How can we fix it so where students are invited can access the conference run by us and not be able to create another conference while still being able to take part in discussions and so on? Thanks.