In Keycloak, you can connect an existing SAML v2.0. Keycloak can broker identity providers based on the SAML v2.0 protocol.
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Open the Keycloak Administration Console.
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In the Manage section, click Identity Providers.
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From the drop-down list, select SAML v2.0.
For more information, see ttps://www.keycloak.org/docs/latest/server_admin/#saml-v2-0-identity-providers.