If you are using Sage 300 ERP 2012 Product Update 1 to manage multiple companies, there is a very helpful feature that you may not know about. You can now assign a unique color to each company, making it easier to see which company you are processing in to avoid data entry errors.
BTerrell Group Blog
If you are considering Sage 300 ERP for your company financials, chances are you are accounting for multiple entities. They could be related holding companies and subsidiaries, not for profits, or even commonly managed investment interests. If so, a well configured Sage 300 ERP system can make your multi-entity accounting tasks easier. Additionally, you will want your ERP data to be structured to make consolidated financial and operational reporting as easy as possible.