Hi Robert Kelen,
Unfortunately we don't have any docs that specifically detail this relationship yet, but it's on the list of Support KB docs we need to draft.
Any of the system managed fields like detailed here Understanding System Managed Fields - Marketo Docs - Product Docs will be owned by Marketo and can't be altered by the sync. But other than these, it's the score fields that apply.
Thanks Mike. Having that future documentation will be helpful for the
On Thu, Aug 18, 2016 at 10:54 AM, Mike Reynolds <firstname.lastname@example.org