How to distribute apps for own organization to their personal device?

We are trying to publish an app for our own organization. Initially we submitted to app store review. It got rejected, because app designed for specific organizations. So we look the other options, 1. Apple business manager - it need managed apple id 2. Apple enterprise account - it also needs to manage apple id My understanding, **managed apple id** means it belongs to organization, we can't use it with our private device. Is it right? We want to install this to their private devices and private apple account. What's the best choice for this case? Feel free to give your own suggestion! Thanks!