When a user is no longer required you must completely remove their user ID from the system to prevent an identical, newly-created user from inheriting the old user's access permissions. This situation can occur because authentication and access permissions are associated with user ID.
You delete a user by removing them from the policy store, the Oracle BI Presentation Catalog, the metadata repository, and the identity store.
See Delete Users Command in Metadata Repository Builder's Guide for Oracle Business Intelligence Enterprise Edition.
If you have assigned the user directly to any application roles, you must remove all references to that user.
deleteusers
command.The user name is removed from the User table in the embedded WebLogic LDAP server.