Create business units
Assign the appropriate seats to one of the business units that you created or to the default business unit.
To create a business unit and assign organization seats in DigiCert® Trust Lifecycle Manager:
From the Trust Lifecycle Manager menu, go to Account > Business units.
Select Create.
Enter the name of the business unit, select the seat type and allocate the required seats.
Select Create.
Once you have the business units you need, create a certificate profile for REST API.