What do we put here or do we HAVE to register at least one domain with them manually before this can be setup? If the latter is the case, this needs to be clearer in the documentation or there needs to be some context help with that entry for namecheap. If I put nothing, it gives an error saying "Failed to save account : Missing or invalid-looking domain to copy contacts from". If I put a domain entry in there it simply says that that domain doesn't exist on their server.
Copy contacts from domain with new namecheap account