How to Tell When an Excel Workbook Was Last Updated

1.
Open Microsoft Excel by going to 'Start,' 'Programs,' 'Microsoft Office' and 'Microsoft Excel' or 'Start' and then 'Microsoft Excel.'
2.
Open an existing spreadsheet by clicking on the Office icon and navigating to the file you want to open or go to 'File' and 'Open.'
3.
Click on the Office icon and go to 'Prepare' then 'Properties.'
4.
Click on 'Document Properties' then 'Advanced Properties.'
5.
Look at 'Modified' in the 'Properties' dialog box. The 'Modified' field is the date that the workbook was last updated.