According to the FAQ, I can enable metadata copying via an API call:
What happens when I copy my files or folders? Is the metadata copied with it?
This is configurable via the API on a template-by-template basis. By default, the metadata is not copied with your files, but it can be configured to be true. Currently, metadata instances without a parent template cannot be copied.
What API call do I use and what value do I need to set to "true" to make this happen? We already have a template set up and are using it. Thanks!