Hi Adam

There are two ways this could be achieved

• Hiding the course under course visibility and changing the learner role for the course to see hidden courses

• Enabling audience based visibility (Site admin > Configure features > Shared services settings and then setting the course visibility setting to Enrolled users only

The audience based visibility option is a bit more flexible as this can also be used for programs and certification. restricting visibility to Audiences members is also able to be included,

regards