These forums are locked and archived, but all topics have been migrated to the new forum. You can search for this topic on the new forum: Search for Add forwarding to email account via API on the new forum.
As far as I can see, it seems that it's not possible to create an email user via the create-user API and add one or more forwarding addresses to that mailbox.
Is this correct, and is this going to be a permanent limitation?