How do you provision onPremisesExtensionAttributes (extensionAttribute) using SCIM

Question

Our organisation has synced the onPremisesExtensionAttributes(extensionAttribute13) to Entra ID.
I have already confirmed that my target user contains this value in the azure portal and using graph api.

When sending the attribute using SCIM the attribute is not send.

Here is my configuration

When using my test user, I fail to see the attribute being updated

Edit attribute List:

What are the next steps I can take to troubleshoot this issue?

I already looked into alternatives using an other type of extension attribute.
https://suryendub.github.io/2024-02-08-directory-extension-attribute/

While this is on the table, it feels like a workaround.

Thank you in advance for your help.

Answer 1

The attribute you are targeting is called "studentNumber" - this isn't allowed. SCIM allows for attributes that are part of the core schema of a resource (e.g.: a user, a group..) to use a short name. The attribute studentNumber is not part of the SCIM spec's core user schema, meaning that it must be referred to with a URN that indicates the schema that the studentNumber attribute belongs to. As an example, urn:ietf:params:scim:schemas:extension:myappname:studentNumber would be valid, assuming the SCIM application has implemented the attribute with the same schema URN and name.