There's four types of user now.
JIRA Users are the standard account - they can log in, get all the project and issue stuff (workflows and fields etc).
Software users get the Scrum and Kanban functions on top of what a JIRA user gets
Agents are what you expect - they deal with the helpdesk stuff
Customers get a very cut down simplified helpdesk portal view. You do not need to think about licences for them.
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