If you want to send a unique link that allows enrollment into a private (unlisted) Program or if you would like to funnel your waves of enrollment into a specific Program, you can do this within your Program settings.
Step 1 - Set The Program As Private
To achieve this, click the edit pencil on the Programs settings page on any Program. Click the "Advanced" settings and switch the toggle to the on position beside "Make private." Click "Save" to save the changes.
Step 2 - Copy The Private Link And Send It
There are two places where you can copy the private enrollment link.
If you need to redo a private link, click the same button you want to copy. Underneath "Copy" is "Break and regenerate." This breaks the link and regenerates a new link.