UMA Policy creation fails with 403 when using custom identity object classes*.*
Deploy AM, embedded config and user store.
Deploy a separate dir server to act as user store.
Add a number of additional attributes to the external directory server, e.g. uTest1, uTest2, uTest3.
Create/modify a test user to then include these custom attributes
Create a sub-realm e.g. subscribers, delete the embedded Identity Store and add the external directory store.
Configure the Identity Store (not sure if needed) to include these attriutes for identities.
Follow the steps detailed at https://backstage.forgerock.com/docs/am/7.1/uma-guide/managing-uma-policies.html#managing-uma-policies.