Azure B2C SAML Email Claim - azure-ad-b2c

Question

I have successfully setup Azure B2C using the local account start packs using B2C as the IDP, we've integrated with a partner and can access their application. How do we go about Passing the local IDP accounts 'email' attribute to the partner as a claim. They're getting first, last name and display name without issue but not receiving the email claim.
Similar issue to this: Azure B2C SAML Custom Policy Assert Email
I've inserted this into the BaseFramework
<ClaimType Id="email">
<DisplayName>Email Address</DisplayName>
<DataType>string</DataType>
<DefaultPartnerClaimTypes>
<Protocol Name="OAuth2" PartnerClaimType="email" />
<Protocol Name="OpenIdConnect" PartnerClaimType="email" />
<Protocol Name="SAML2" PartnerClaimType="http://schemas.xmlsoap.org/ws/2005/05/identity/claims/email" />
</DefaultPartnerClaimTypes>
...
</ClaimType>
And this Technical Profile
<TechnicalProfile Id="AAD-UserReadUsingObjectId">
<Metadata>
<Item Key="Operation">Read</Item>
<Item Key="RaiseErrorIfClaimsPrincipalDoesNotExist">true</Item>
</Metadata>
<IncludeInSso>false</IncludeInSso>
<InputClaims>
<InputClaim ClaimTypeReferenceId="objectId" Required="true" />
</InputClaims>
<OutputClaims>
<!-- Optional claims -->
<OutputClaim ClaimTypeReferenceId="signInNames.emailAddress" />
<OutputClaim ClaimTypeReferenceId="displayName" />
<OutputClaim ClaimTypeReferenceId="otherMails" />
<OutputClaim ClaimTypeReferenceId="givenName" />
<OutputClaim ClaimTypeReferenceId="surname" />
</OutputClaims>
<IncludeTechnicalProfile ReferenceId="AAD-Common" />
</TechnicalProfile>
and then this in the SAML flow:
<RelyingParty>
<DefaultUserJourney ReferenceId="SignUpOrSignInWithCA" />
<TechnicalProfile Id="PolicyProfile">
<DisplayName>PolicyProfile</DisplayName>
<Protocol Name="SAML2" />
<OutputClaims>
<OutputClaim ClaimTypeReferenceId="displayName" />
<OutputClaim ClaimTypeReferenceId="givenName" />
<OutputClaim ClaimTypeReferenceId="surname" />
<OutputClaim ClaimTypeReferenceId="email" DefaultValue="" />
<OutputClaim ClaimTypeReferenceId="identityProvider" DefaultValue="" />
<OutputClaim ClaimTypeReferenceId="objectId" PartnerClaimType="objectId" />
</OutputClaims>
<SubjectNamingInfo ClaimType="objectId" ExcludeAsClaim="true" />
</TechnicalProfile>
</RelyingParty>
But it's still not working
As above modified as per documentation

Answer 1

You didn’t need to make any of these changes, except in the third snippet you needed to put this
<OutputClaim ClaimTypeReferenceId="signInNames.emailAddress" PartnerClaimType="email" />
This takes the signInNames.emailAddress and issues it as “email” into the token.
Currently you defined a claim called email, read a claim called signInNames.emailAddress, then try to issue a claim called email into the token, which will be null.