Cannot map expando attributes in SAML Admin

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X EE
• Fix Version/s: 6.2.X EE, 7.0.X EE, Master
• Component/s: Application Security > SAML
• Labels:
  • liferay-saml-2.0-provider-3.1.0
• Branch Version/s:
  7.0.x, 6.2.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/17574

Steps to reproduce:

1. On IdP, create custom field called "CustomField" for User
2. On IdP, create a new user with a value for CustomField
3. On SP, create the same user as above (without any custom field)
4. Configure portal as IdP and SP following the steps here
   • IdP > Service Provider Connections > Attributes => expando:CustomField
   • SP > Identity Provider Connection > Attribute Mapping => CustomField=firstName
5. Sign in on SP using user in step 2

Expected Result: Expando attribute for the IdP user is mapped over to the firstName attribute for the SP user.

Actual Result: The firstName attribute for the SP user isn't updated.

Reproduced on:
Tomcat 8.0.32 + MySQL 5.7.17
Portal ee-7.0.x Git Hash: 5583024f2d20dc2330dfe31da1606dcbc3e9a22c