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Power Pages not overwriting fields with returned claims

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Posted on by power_user_420

Hello,

I have a requirement where business create the users (contact) in the Dataverse and a custom invitation email gets trigger.

When a user signup using B2C, it correctly gets map to the existing user in the dataverse.

I have the following RegistrationClaimsMapping in site settings -

firstname=given_name,nickname=name,lastname=family_name

But Power Pages somehow do not update the firstname and lastname fields. It only updates the nickname.

If I do something like -

firstname=name,nickname=name,lastname=name

It updates the values in all three fields correctly with same value.

I have verified that b2c is returning claims with correct names.

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Power Apps portals

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oliver.rodrigues 9,482 Most Valuable Professional on at

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Hi, have you enabled JWT in the B2C for testing purposes? and then can you check if the given name / family name are returning in the Token?

sometimes the family name is called surname, but I haven't used B2C in a while now

I also like to set the Site Setting LoginClaimsMapping with usually the same option as the Registration one

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power_user_420 27 on at

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Hi Oliver,

Yes, I checked using jwt.ms, the claims are there with the same name I am using.

I have also checked using the devtools, b2c is returning the claims to portal.

I tried setting LoginClaimsMapping also, same issue, only nickname is populating. Also, I don't want to update the fields every time user login. It should only overwrite the first time, and then user can change profile from portal.

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power_user_420 27 on at

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Finally found a solution.

Power Pages (.NET) is renaming some default claims internally to complete schema URL like from given_name to http://schemas.xmlsoap.org/ws/2005/05/identity/claims/givenname

The below setting worked for me -

firstname=http://schemas.xmlsoap.org/ws/2005/05/identity/claims/givenname,lastname=http://schemas.xmlsoap.org/ws/2005/05/identity/claims/surname,middlename=name

The name claim works because it doesn't renamed by pages.

The poor documentation keeps making my experience with Power Pages worse and worse.

References -

1. https://debajmecrm.com/deep-dive-dynamics-365-portal-authentication-with-azure-ad-b2c-provider/

2. https://mderriey.com/2019/06/23/where-are-my-jwt-claims/

3. https://clintmcmahon.com/Blog/aspnet-core-sub-claim-mapping

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