Login to Atlassian Marketplace and enter
Pact
Select Data Center from the drop down box.
Click on Try it free/ Buy it now.
User will be redirected to below page.
Enter the details and click on Generate License.
Copy the license key and download the app by clicking on Download button.
Login to Jira.
Click on Jira Administration and select
...
Manage apps.
Click on Manage apps under Atlassian Marketplace section.
Upload jar file downloaded in the previous step.
Add the generated license key in license key box.
