This defines the class used to map attributes in the assertion to user attributes defined locally by the identity provider. The default class is com.sun.identity.wsfederation.plugins.DefaultSPAttributeMapper.
Specifies values to define the mappings used by the default attribute mapper plug-in. Mappings should be configured in the format:
SAML_attr=local-attribute
For example, EmailAddress=mail or Address=postaladdress. Type the mapping as a New Value and click Add.