Configure FindDuplicates
Once FindDuplicates is installed and license applied, admin can change standard plug-in settings.
This step is optional. The plug-in is by default integrated with Jira, and will work even without custom settings. The system will use standard configuration.
To access Configuration page follow the steps:
Go to JIRA Administration > Add-ons > Manage add-ons > FindDuplicates
OR
Atlassian Marketplace > MyAtlassian > FindDuplicatesPress Configure button
   → In the opened FindDuplicates Plug-in Configuration page admin user can modify General settings, specify integration settings with other plug-ins, and define project restrictions.
For more information please refer to: