To merge a license key, first, ensure your product is registered on the Support Portal. Directions to register can be found here: https://support.oneidentity.com/essentials/getting-started-with-my-licensing
Once registered, go you My Account and Select My License Assets on the One Identity Support Portal.
In the My Assets list, locate the licenses you wish to merge
Make note of the license number for the license you wish to be the secondary license to be merged into the primary license. In this scenario, license 001 will be the primary and 002 will be secondary. Then, select the link for "Would you like to merge this license" for your primary license.
Enter the license number for your secondary license and choose "Fetch".
Verify the information for the selected license is correct and choose Save Changes.The new merged key will appear on the My Assets list and will be automatically e-mailed to you.