If you would like to enable Shared Workbook option, here's a way to add it to Excel Quick Access Toolbar. It is hidden under Excel Options.

How to Enable Scrolling in Excel 2007. Microsoft Excel 2007 allows you to scroll through your business worksheet so your data comes quickly into view.

How to Enable Autosave in Excel 2007. A nightmare scenario: A power outage occurs after you've spent several hours slaving away on an Excel spreadsheet filled with important numbers and other data ...