Director has supported streaming to business pages for Facebook Live since V3.2.

For users who cannot stream to business pages, you can follow the below steps.

1. Upgrade your firmware to a newer version (V3.2.1273 and above).
2. Go to Facebook > Settings & privacy > Business integrations, remove Director from "Active".
3. Log out your account on the Director device.
   
4. Log in your account again and finish the authentication.
   
5. Tap Post To, find your business page, and select it.
   
6. Go back to the main screen and then start streaming to Facebook Live.