Purchasing from Atlassian. You can purchase a license via Atlassian on the Atlassian Marketplace. After the purchase is completed, Tempo Help Center Licensing your Jira applications - Atlassian Documentation
To generate evaluation keys for add-ons and Jira apps, browse the Atlassian Marketplace . Clicking Try it free will let you seamlessly generate a matching app license linked to your account. ⚙️ How to Legally Apply an Updated License in Jira Atlassian Jira License Key Generator
The most common way to get a functional Jira license key for a new instance (especially for Data Center versions) is through the official licensing portal. Log in to the Atlassian Licensing Portal "New Trial License" from the licenses tab. Purchasing from Atlassian