An unlisted user’s name does not appear to regular users in the repository user list. While a user is unlisted, the only places their names appear are:
User lists in the Administration area.
User list for adding people to a room (in the New Room dialog box or Add Member dialog) when viewed by a user manager.
Member lists of rooms in which user is a member.
Contexts where the user is already picked for some purpose, such as an permission set entry for an object, the Owner attribute of an object, a member field in a table, or a performer assignment in a Quickflow.
Applications outside of WDK, such as the Workflow Manager.
Unlisted users appear in user lists with "[unlisted]" after their names, except in room lists.
A group for unlisted users, called dce_hidden_users, is created at the root of the repository user list. This group is visible to administrators, and to user managers in the Administration area, and administrators should avoid renaming or deleting it. The group’s description states that it is managed by collaborative services, and its child list should not be modified directly. If a group with the same name already exists, that group is used instead of a new one. If a group with the correct name cannot be found, it is created. Administrators, and user managers can open the group to view its children, but they cannot manually add users to or remove users from this group.
Note: Unlisting affects lists, not objects. Content created by an unlisted user is unaffected. Unlisting takes effect as soon as the user manager saves the dialog box.