Conferences created to be long running (no end time) can be edited manually to include late registrants.
If a Canvas BigBlueButton Conference activity has already been created and students are registered to the course at a later date they can be manually added to the Conference activity.
Note: This only applies to long running conferences; conferences that are in progress or have concluded can not be edited.
To add late registrants:
Locate the long running conference you wish to update, click the cog wheel icon, and select edit.
Then choose invite all course members [1] and select update [2] to save the changes.
Refresh the Conferences page.
All course members, including late registrants, will now have access to the conference and ability to view any subsequent recordings.