What happens when I open a document created in a previous version of Office?
Short answer: It will be opened in Compatibility Mode, and will retain its original file format. In Office 2007, for Word, Excel, PowerPoint, and Access, when you open a document that was created in a previous version of Office, a Compatibility Mode is turned on—you will see Compatibility Mode in the title bar of the document window. Compatibility Mode means that the file will remain in its original format. Some features in Office 2007 are not available when editing in Compatibility Mode, but 99% of functionality is the same. There could be issues with Access databases if there are macros or other programming features in your database — contact Help Desk for more info.