Field Security?

We are utilizing Global Supplier setup amongst our companies and it is working great and in order to maintain the integrity of the required data we have limited access to the supplier maintenance menu. The question I have is when it comes to contacts section, ratings and some other items we are not concerned about the plants personnel modifying this data. I believe I know the answer but would the best way to control this be with field security to where only our supplier entry group has full access to certain fields such as ID, terms, vendor bank, purchase points and then open up supplier maintenance menu? I assume if we did then they would not be able to create a new supplier since they could not edit required fields like ID.

Take a look at the global table setup, this is where you configure which fields are replicated via the Multi company process, which are locked, and which can be changed after sync’d.