Use this procedure to enter mapping data on the behalf of other users. As an administrator you enter the credentials users need to access the target back-end system.
More information: Administration of Users, Groups, and Roles
If a user mapping has already been saved for a particular system, an ex ( X ) appears beside the name.
For more information, see the portal documentation.
This option is only available if the system was configured in the portal system landscape and you configured User Mapping Fields.