Currently, course administrator visibility by default is set to 'All Admin'. When course visibility for admin is assigned to specific department, the courses in which the default setting is auto-applied remains visible - which makes it difficult and involves too much of manual operation. Ideally, at course level, when course visibility is restricted to a specific department, the course should be visible only to that selected department - which makes it a one step process. By default, the visibility should be 'None'.