Installing "Metadata for Jira" via the UPM

Click the cog icon at top right of the screen and select Add-ons.
The Administration Console is displayed.
In the Atlassian Marketplace section, click Find New Add-ons.
In the search field, enter "Metadata for Jira" and press Enter.
The search results are displayed.
Select the "Metadata for Jira" add-on.
The plugin details are displayed.
To install a version, click Install.

"Metadata for Jira" is displayed under Manage Plugins > User-installed Plugins.