Just-in-time (JIT) account creation, sometimes called JIT provisioning, creates an account on an app for a user as they attempt to authenticate for the first time. You can configure JIT account creation from your identity provider (IDP) into Identity Security Cloud so that users are able to continue working seamlessly in your SailPoint environment.
This is the companion discussion topic for the documentation at https://documentation.sailpoint.com/saas/help/common/jit-accounts.html