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The IdP expresses support for a name identifier through its metadata. This is done by adding a new NameIDFormat element to both the IdP's IDPSSODescriptor and AttributeAuthorityDescriptor roles. The value of this element should be the name format as configured in the name identifier attribute encoder.
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<NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:persistent</NameIDFormat> |
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