Enterprise Domains are groups of databases that can share enterprise roles, proxy permissions, user-schema mappings, current user database links, and permitted authentication mechanisms. A database can belong to only one enterprise domain.
An enterprise domain can be thought of as an administrative domain, administered by the Domain Admins group for that domain. These administrators can add databases to the enterprise domain.
An identity management realm contains an enterprise domain called OracleDefaultDomain. OracleDefaultDomain is part of the realm when it is first created in the directory. When a new database is registered into a realm, it automatically becomes a member of OracleDefaultDomain in that realm. You can create and remove your own enterprise domains, but you must not remove OracleDefaultDomain from a realm.
This section describes how to use Oracle Enterprise Manager to administer enterprise domains in the directory. It contains the following topics: