ADB2C Rest API not save custom attribute to profile - azure-ad-b2c

Question

I enabled custom policy in ADB2C and to add more claims I used a rest API to return data for the custom attribute
the response from RESTAPI looks like below :
{
"version" : "1.0.0",
"action" : "Continue",
"extension_<client_id>_empid" : 15,
"extension_empid" :15,
}
and in the claims, I can read this value but actually this value not saving to the user profile so when I fetch the data using graph it's not coming back How I can override this value to user profile

Answer 1

Assuming extension_empid claim is defined like this:
<ClaimType Id="extension_empid">
<DisplayName>Employee ID</DisplayName>
<DataType>long</DataType>
</ClaimType>
it seems obtaining(parsing from JSON) claim is missing from your REST API, in Restful technical profile OutputClaims collection should contain the element:
<TechnicalProfile Id="getEmployeeInfoAPI">
<DisplayName>Get Employee info</DisplayName>
<Protocol Name="Proprietary" Handler="Web.TPEngine.Providers.RestfulProvider, Web.TPEngine, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
...
<OutputClaims>
...
<OutputClaim ClaimTypeReferenceId="extension_empid" PartnerClaimType="extension_empid" />
</OutputClaims>
<UseTechnicalProfileForSessionManagement ReferenceId="SM-Noop" />
</TechnicalProfile>
And finally in AAD-UserWriteUsingLogonEmail technical profile, PersistedClaims element should contain the element to persist the data to the directory:
<TechnicalProfile Id="AAD-UserWriteUsingLogonEmail">
...
<PersistedClaims>
...
<PersistedClaim ClaimTypeReferenceId="extension_empid" />
</PersistedClaims>
</TechnicalProfile>