Web Single Sign-On Metadata Exchange Protocol is a Web Services and Federated identity specification, published by Microsoft and Sun Microsystems that defines mechanisms for a service to query an identity provider for metadata concerning the protocol suites it supports. The goal of this operation is to increase the ability of a given service to interoperate with a given identity provider.1
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Last revised Jul 16, 2026
Web Single Sign-On Metadata Exchange Protocol
Web Single Sign-On Metadata Exchange Protocol is a Web Services and Federated identity specification, published by Microsoft and Sun Microsystems that defines mechanisms for a service to query an identity provider for metadata concerning the protocol suites it supports. The goal of this operation is to increase the ability of a given service to interoperate with a given identity provider.