Home > Storage > ObjectScale and ECS > Product Documentation > ECS IAM Introduction > Introduction
The service enables managing IAM identities within each namespace, such as users, groups, and roles. With IAM, we introduce a new namespace root user that is an admin user for the namespace. All IAM entities have a unique ID associated with them. Deleting and re-creating an entity with the same name creates a unique ID for the new entity.
Note: A namespace is conceptually the same as a tenant in ECS. Namespaces are global resources created and assigned to a replication group. A key characteristic of a namespace is that users from one namespace cannot access objects in another namespace.