Does every user need a licence?
There is nothing to assign per person. Out of Office Assistant follows Atlassian's standard licensing model for Cloud apps: one subscription covers every user on your Jira site, at the same user tier as Jira itself.
The app does check that the subscription is valid before it acts. Without a valid one its controls are locked or hidden, scheduled jobs stop, work items are no longer reassigned even where a rule is active, and the Out of Office section on a work item shows an unlicensed message.
The subscription is handled by Atlassian, so a lapsed one is fixed in Atlassian Administration rather than in App Settings.
Related pages
Installation and Setup Guide - where this is covered in full.
Setup and Installation - more questions on this topic.
