Our accounting group is on office 2003 and we are planning to upgrade to Office 2007. The problem that we are foreseeing is that they have a lot of excel spreadsheets with external links. Some of the master copies have external links and the external links are linked to other external links. If we upgrade the master workbooks to 2007, what would happen to the external links (and those linked to them)? I've read the following article (http://support.microsoft.com/kb/925893
) but it says it willl prompt to update the links. What does that mean? Does it upgrade the excel spreadsheets to 2007 or do the documents stay in 2003 but just reflect to the new master workbook that is in 2007. Then what happens when I upgrade the external workbooks to 2007? Thanks for working on this one.