Cross-origin resources allow external scripts and third-party applications to make calls to the Blackboard REST API without being blocked by browsers.

To work with cross-origin resources, go to Admin Panel > Integrations > Cross-Origin Resource Sharing. You will see a list of already configured cross-origin resources, and you can edit, delete, or deactivate those listed. 

To create a new resource, click Create Configuration and fill in Origin and the allowed headers for that origin. Mark as available and save.