This came up as a question from a developer, "How do I create a course in Learn that has a different course ID than the external Id? (The external Id is also often referred to as the batch UID.) The answer is to use the SIS Flat-File integration capability of Learn that is available on the System Administration tab. You can log in as a Learn administrator on a Learn system and follow along with the example given in this video: Create and Upload Courses Using a Flat File

 

For reference the documentation is given here:

Student Information System (SIS) | Blackboard Help

Create and Edit SIS Integrations | Blackboard Help

SIS Feed Files | Blackboard Help

Snapshot Flat File Examples | Blackboard Help

Course Examples | Blackboard Help