Hello,
Access the Schemas endpoints via GET at `/restv1/scim/v2/Schemas`, so to inspect user schema you just need to visit `https://<host-name>/identity/restv1/scim/v2/Schemas/urn:ietf:params:scim:schemas:core:2.0:User` in your browser.
There you'll see those 3 attributes you mentioned as `required`. According to SCIM spec they shouldn't be, however, our UI form to create users (in oxTrust) have always had those as required fields...
For upcoming 3.1.3 version they'll be optional in our SCIM schema (we have to adhere to standard) but still need to see how to cope with edition of users in the UI that might miss those attributes.
> The attribute configuration Web UI does not appear to expose the 'required' field
Yes, this SCIM attribute characteristic is not editable - it's hardcoded - and we don't support to change it at runtime. We should simply try to follow the same schema as shown in the spec (RFC 7643).
Regards,
Jose