Import all users from joomla to moodle

Is it possible to import all accounts from joomla to moodle. I have synchronization turned on and new accounts are automatically transferred to moodle. How to add older accounts - before moodle installation.

Hi.

It is not possible, but usually it is not needed. How do you intend your users to use Moodle?
If users are buying courses in Joomla, or just enroling to courses from Joomla, Joomdle will create the users when needed. So, if I buy/enrol a course, the Moodle user will be created at that point.

I sell content of my page with Hikashop. If user buy something it always is connected to quiz. I am using JoomlaQuizDeluxe which is no longer being developed. I have moodle now and I dont knwo how to enroll users to quiz. I have my own plugin that starts onAfterOrderUpdate and there I would like to place the code that will add the user to the moodle course. Maybe it can be done more simply?

There a Joomdle-Hikashop integration to sell courses. It would be easier to use it than trying to create your own integration, although of course it can be done too.