Current user database links require SSL-enabled network connections between the databases. Before you can enable current user database links, you must enable SSL, create Oracle wallets, and obtain PKI credentials for all databases involved.
Then, use Oracle Enterprise Manager to enable current user database links between databases within the enterprise domain in the directory by using the following steps:
Log in to Enterprise Manager Cloud Control, as an administrative user.
To navigate to your database, select Databases from the Targets menu.
Click the database name in the list that appears. The database page appears.
Under the Administration menu, select Security, Enterprise User Security. The Oracle Internet Directory Login page appears.
Enter the distinguished name (DN) of a directory user who can administer enterprise users in the User field. Enter the user password in the Password field. Click Login.
The Enterprise User Security page appears.
Click Manage Enterprise Domains.
The Manage Enterprise Domains page appears. This page lists the enterprise domains in the identity management realm.
Select the enterprise domain that you wish to configure. Click Configure.
The Configure Domain page appears.
Click the Configuration tab.
Select Enable Current User Database Links in this domain.
Click OK.