This blog shows how to add new user in your organization to access sites on Office 365 also, where different types of users can access Office 365 in different way. Here is the list (please ref on Microsoft site).

Different Type of users like

Licensed users, Sign-in allowed, Sign-in blocked, unlicensed users, users with errors, billing admins, Global admins, Password admins etc.

Password

Roles

Product Licences

Happy reading. Thank you. Any suggestion/feedback is welcome.