In versions earlier than 15.6, the only way to synchronize users in the primary database and users in the Replication Agent System Database (RASD) was to use pdb_xlog init, force. However, this command also refreshes the table schema and therefore requires extra time.
In Replication Agent 15.6, you can use the ra_updateusers command to reload all the user information from the primary database to the RASD. The ra_updateusers command refreshes only user information.
This command is available only for Oracle.
ra_updateusers
ra_updateusers reloads user information to the RASD from the primary database. Use this command when user information in the RASD becomes unsynchronized with the primary database.
Use ra_updateusers only when Replication Agent is in the Admin or Replication Down state.