Sync to AD (WP new user)

You mean that you cannot sync WordPress user to the Active Directory? Did you follow https://active-directory-wp.com/docs/Configuration/Sync_to_AD.html? What are NADI’s debug logs saying?

No I can sync WordPress user to the Active Directory when AD have the same user, but new user in WP won’t autocreate in AD, I want the new user register on WordPress and new user sync back to Active Directory.

Ah!
Creating new Active Directory users is outside the scope of NADI due to security and compliance reasons. But you can use the hook next_ad_int_sync_wp2ad_after_user_synchronize to implement such a logic by yourself.