I hope this isn't against the rules in some way, but this question is about an example question in the official Integration & Access Management exam guide.
The question is as follows:
Universal Containers (UC) has chosen to implement a hub-and-spoke Salesforce org strategy where a subset of users in the hub org should be able to access resources in any of the spoke orgs. The IT team at UC has decided they would like to manage users in the hub org and automatically create those users in the spoke orgs, as needed, to reduce administrative burden. They will configure the hub org as an Identity Provider and use SAML to authenticate users in the spoke orgs. What is the recommended solution for automatically creating users in the spoke orgs?
Two of the answers are:
A. Use an IdP-initiated SAML flow and Custom SAML JIT Provisioning to create users in the spoke orgs. B. Use an IdP-initiated SAML flow and Salesforce SAML JIT Provisioning to create users in the spoke orgs.
According to the exam guide, the correct answer is A, but I don't understand why? What part of the question specifies that it should be custom JIT Provisioning and not 'standard' SAML JIT provisioning? I can't seem to find anything in the docs that would prevent regular provisioning from covering this particular scenario.