Sun OpenSSO Enterprise 8.0 Administration Reference

Attribute Name for Name ID Information Key

Specifies the attribute name used to store name identifier key on a user's entry. If not specified, the default attribute (sun-fm-saml2-nameid-infokey) will be used. The corresponding datastore bind user must have read/write/search/compare permission to this attribute. You must also must make sure that the equality type index is added.