How to enrol users in all free LearnDash courses upon registration.
There is no special extension for integration between Ultimate Member and LearnDash plugins.
You can use the solution provided by LearnDash support if you need to enrol users in all free courses upon registration. Just add this code snippet to the functions.php file in your active theme directory.
NOTE: This information is provided for guidance. However, we are not able to provide any support when it comes to customization of the plugin. If you need help implementing a code, please hire a developer.