Change the Email Address of one of my employees...

Change the Email Address of one of my employees...

Hello

I have a couple deactivated users on my Zoho CRM Account, how can I change the email to assign the user to a new employee?. We don't have the access credentials of this user, but I have the CEO role, is it possible?, if not, can I delete the user an create a new one without having to pay more for this user?

Regards.