by Angel Diaz Incio.
Thanks a lot for the answer, unfortunately, i think i wasn't clear enough so i'll try to explain myself better this time.
Since we have 2 active platforms, we don't need to upgrade the 2.3 to 3.3, we need to move some courses from a 2.3 Moodle Installation to a 3.3 Moodle Installation, the problem is that we have a course structure in 2.3 and we have a different course structure in 3.3 (Example as attachment, the course in red showing where it was and where it will move), what we need to do is move all the user database, move active courses only (we can leave finished courses behind), and move all the participation and grades of the users enrolled in those courses from 2.3 to the 3.3 platform.
Is there a way to move all the users and the active courses from one platform (2.3) to the other (3.3) keeping the participation and grades intact?. Maybe migrating all those to a single category and then moving each one manually to their respective place.
Thanks a lot for your attention and sorry if i wasn't clear in my first post.