# JAAS > JAAS is an enterprise layer on top of Juju that provides centralized controller management, OIDC authentication, and ReBAC authorization. 2026 CC-BY-SA, Canonical Group Ltd ## Pages in this subsection - [Manage groups](https://documentation.ubuntu.com/jaas/latest/howto/manage-groups.md): Learn how to create, rename, and manage groups in JAAS to organize users and control access to models, clouds, and controllers. Includes migration to IdP groups. ## Optional - [Top-level llms.txt](https://documentation.ubuntu.com/jaas/latest/llms.txt): Complete documentation index.