A first assignment to clean up our MKTO data was normalizing country names. Our MKTO records use 6 variations for United States. There are numerous misspellings on some countries, and widespread use of the ISO code instead of the (MKTO preferred) country name. It was time-consuming, but I got it all done.
Today I pulled a report for a campaign, and I noticed that every single one of my corrections has been undone. I can only assume that my MKTO records were over-written by the SF record during sync (I don't have SF access so I can't confirm that).
How would a person go about making sure that the MKTO data takes priority and updates SFDC instead of the other way around?