Auzmor's social learn allows admins to enable & disable forums for individual training (courses, events & paths).

1. The admin has to go to a particular course/event/path and access the settings to spot the Forum settings. Course/event/path page > Settings > Forum settings > Enable/Disable.
2. Here the admin can choose to enable or disable it for a particular forum. By default for all the courses, events & paths the forums are enabled. 
3. Now disabling the forum will prevent the learners from accessing it by hiding it from the learners.