Centralizing management makes it easier and faster to administer users, credentials, and roles, and to quickly revoke a user's privileges on all applications and databases across the enterprise. With centralized management, the administrator can delete a user in one place to revoke all global privileges, minimizing the risk of retaining unintended privileges.
Centralizing management makes it possible to centralize an organization's security expertise. Specialized, security-aware administrators can manage all aspects of enterprise user security, including directory security, user roles and privileges, and database access. This is a substantial improvement over the traditional model, where DBAs are typically responsible for everything on the databases they manage, including security.