One of the most impressive controls that Excel Services offers its spreadsheet owners is the ability to limit which parts of the workbook are accessible through the server (IE, sharepoint, API, etc). This is an incredibly powerful ability, especially considering the environment where it is hosted (network).
Why is this so great?
What can Excel Services publish (or hide)
Great, but how do I do this?
As easy as 1-2-3. When you finished working on your spreadsheet, all you need to do is: