Hello @Anonymous !
I moved your question to the Subscription changes board because in my opinion your question is related to changes we are running.
If you are looking for simple answer, so I would say no, all users should transferred to Named users with their own(corporate) email.
But let me share these links with you to help you understand what and why Autodesk doing:
Transition to Named User FAQ (Read Before You Post)
More Resources for Transition to Named User
Находите сообщения полезными? Поставьте "НРАВИТСЯ" этим сообщениям! | Do you find the posts helpful? "LIKE" these posts!
На ваш вопрос успешно ответили? Нажмите кнопку "УТВЕРДИТЬ РЕШЕНИЕ" | Have your question been answered successfully? Click "ACCEPT SOLUTION" button.
Лена Талхина/Lena TalkhinaМенеджер Сообщества - Русский/Community Manager - Russian