Azure AD B2C Custom Policy - Using OutputClaimsTransformation

Question

I would like to transform the displayName from two Outputclaims, surName and givenName. I used the example provided here to FormatStringMultipleClaims.

https://learn.microsoft.com/en-us/azure/active-directory-b2c/string-transformations

<ClaimsTransformation Id="CreateDisplayNameFromFirstNameAndLastName" TransformationMethod="FormatStringMultipleClaims">
  <InputClaims>
    <InputClaim ClaimTypeReferenceId="givenName" TransformationClaimType="inputClaim1" />
    <InputClaim ClaimTypeReferenceId="surName" TransformationClaimType="inputClaim2" />
  </InputClaims>
  <InputParameters>
    <InputParameter Id="stringFormat" DataType="string" Value="{0} {1}" />
  </InputParameters>
  <OutputClaims>
    <OutputClaim ClaimTypeReferenceId="displayName" TransformationClaimType="outputClaim" />
  </OutputClaims>
</ClaimsTransformation>

After trying a few things from the above resource, I still see 'unknown' as the display name for the test User I signed up with.

Here is how my TechnicalProfile looks with User Sign Up:

    <ClaimsProvider>
      <DisplayName>Local Account SignUp</DisplayName>
      <TechnicalProfiles>
        <TechnicalProfile Id="CustomLocalAccountSignUpWithLogonEmail">
          <DisplayName>Email signup</DisplayName>
          <Protocol Name="Proprietary" Handler="Web.TPEngine.Providers.SelfAssertedAttributeProvider, Web.TPEngine, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
          <Metadata>
            <Item Key="IpAddressClaimReferenceId">IpAddress</Item>
            <Item Key="ContentDefinitionReferenceId">api.localaccountsignup</Item>
          </Metadata>
          <CryptographicKeys>
            <Key Id="issuer_secret" StorageReferenceId="B2C_1A_TokenSigningKeyContainer" />
          </CryptographicKeys>
          <InputClaims>
            <InputClaim ClaimTypeReferenceId="email" />
          </InputClaims>
          <OutputClaims>
            <OutputClaim ClaimTypeReferenceId="objectId" />
            <OutputClaim ClaimTypeReferenceId="email" PartnerClaimType="Verified.Email" Required="true" />
            <OutputClaim ClaimTypeReferenceId="newPassword" Required="true" />
            <OutputClaim ClaimTypeReferenceId="reenterPassword" Required="true" />
            <OutputClaim ClaimTypeReferenceId="executed-SelfAsserted-Input" DefaultValue="true" />
            <OutputClaim ClaimTypeReferenceId="authenticationSource" />
            <OutputClaim ClaimTypeReferenceId="newUser" />
            <OutputClaim ClaimTypeReferenceId="zipCode" />
            <OutputClaim ClaimTypeReferenceId="phoneNumber" />
            <!-- Optional claims, to be collected from the user -->
            <OutputClaim ClaimTypeReferenceId="givenName" />
            <OutputClaim ClaimTypeReferenceId="surName" />
          </OutputClaims>

          <OutputClaimsTransformations>
            <OutputClaimsTransformation ReferenceId="CreateDisplayNameFromFirstNameAndLastName" />
          </OutputClaimsTransformations>

          <ValidationTechnicalProfiles>
            <ValidationTechnicalProfile ReferenceId="AAD-CustomUserWriteUsingLogonEmail" />
          </ValidationTechnicalProfiles>
          <UseTechnicalProfileForSessionManagement ReferenceId="SM-AAD" />
        </TechnicalProfile>

        <TechnicalProfile Id="AAD-CustomUserWriteUsingLogonEmail">
          <Metadata>
            <Item Key="Operation">Write</Item>
            <Item Key="RaiseErrorIfClaimsPrincipalAlreadyExists">true</Item>
          </Metadata>
          <IncludeInSso>false</IncludeInSso>
          <InputClaims>
            <InputClaim ClaimTypeReferenceId="email" PartnerClaimType="signInNames.emailAddress" Required="true" />
          </InputClaims>
          <PersistedClaims>
            <!-- Required claims -->
            <PersistedClaim ClaimTypeReferenceId="email" PartnerClaimType="signInNames.emailAddress" />
            <PersistedClaim ClaimTypeReferenceId="email" PartnerClaimType="mail" />
            <PersistedClaim ClaimTypeReferenceId="newPassword" PartnerClaimType="password" />
            <PersistedClaim ClaimTypeReferenceId="displayName" />
            <PersistedClaim ClaimTypeReferenceId="passwordPolicies" DefaultValue="DisablePasswordExpiration" />

            <!-- Optional claims. -->
            <PersistedClaim ClaimTypeReferenceId="givenName" />
            <PersistedClaim ClaimTypeReferenceId="surname" />
            <PersistedClaim ClaimTypeReferenceId="zipCode" PartnerClaimType="postalCode" />
            <PersistedClaim ClaimTypeReferenceId="phoneNumber" PartnerClaimType="mobile" />
          </PersistedClaims>
          <OutputClaims>
            <OutputClaim ClaimTypeReferenceId="objectId" />
            <OutputClaim ClaimTypeReferenceId="newUser" PartnerClaimType="newClaimsPrincipalCreated" />
            <OutputClaim ClaimTypeReferenceId="authenticationSource" DefaultValue="localAccountAuthentication" />
            <OutputClaim ClaimTypeReferenceId="userPrincipalName" />
            <OutputClaim ClaimTypeReferenceId="signInNames.emailAddress" />
          </OutputClaims>
          <IncludeTechnicalProfile ReferenceId="AAD-Common" />
          <UseTechnicalProfileForSessionManagement ReferenceId="SM-AAD" />
        </TechnicalProfile>

      </TechnicalProfiles>
    </ClaimsProvider>

I asked for the givenName and the surName during sign up, and they are returned as an OutputClaim. After the User has provided the givenName and the surName, I make a request to the ClaimsTransformation to transform givenName and surName into a displayName. Finally, I persisted DisplayName.

Unfortunately, displayName still comes out as 'Unknown'

Answer 1

Try setting displayName as an output claim in "CustomLocalAccountSignUpWithLogonEmail".