About external user registration
Using this level of Open Security functionality, an RSSE application obtains all user information from the external security source. The RSSE application determines whether the user credentials are valid and specifies the user’s properties. You can use page-level security with this level of Open Security.
At this Open Security level, the Encyclopedia volume passes the user’s login ID and credentials to the RSSE application. The application evaluates the credentials and determines whether the user can access the Encyclopedia volume and, if so, what the user properties are.
The external security source maintains the following user information:

User name

E-mail address

Web viewing preference

Home folder

Privilege template

Maximum job priority

Security role membership

Security IDs for page-level security

Notification preference

Notification group membership

Channels to which the user subscribes
At this Open Security level, you do not specify or store the user in the Encyclopedia volume. If your security source contains user profiles having the appropriate user information, developers can create an RSSE application that uses this information. You do not have to duplicate the user information in the Encyclopedia volume.
You define privileges for files and folders using security roles or user names. Use Management Console to assign privileges.
At this Open Security level, the external security source provides the identities of users, security roles, and notification groups. The external security source provides a single, unique identity for each Encyclopedia volume user, security role, and notification group.
Master lists of users, security roles, and notification groups are not in the Encyclopedia volume. Instead, the Encyclopedia volume uses the RSSE application to retrieve lists of users, security roles, and notification groups and their properties.
The Encyclopedia volume stores ACLs for each folder and other items, such as designs and other files in the Encyclopedia volume, jobs, and channels. The ACLs contain the user and security role names from the RSSE and the privileges assigned to each user and security role.