[keycloak-user] Using email attribute in SAML identity brokering

[Moshe Ben-Shoham]

Hi,

We have a few clients integrated with Keycloak relam, using email address as the user identifier.

Now we wish to integrate KeyCloak with external IdP using its identity brokering capabilities based on SAML. The problem is, the user identifier in the external IdP is not the email address but some other username. We are able to get the email as an attribute in the SAML assertion coming into KeyCloak, but the missing part is mapping the email attribute to the user identifier in KeyCloak - how do we do that?

Thanks!
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