Is it feasible to have multiple user provisioning methods on a single application, given that the user data in my company is managed by various HR systems due to its multiple entities?

To allow for multiple user provisioning options on the same portal, users must be allocated to different domains, and each data feed must be individually configured for the respective domain(s). Although there is a cost associated with each distinct set up, a blend of various user provisioning methods are permitted on the same portal. Provided there are no other conflicts, such as using different login methods or wanting to utilize an alternative business name, users from various domains can use the same URL to access their training. 

To discuss your requirements in futher detail speak to your assigned customer success manager.