I have a workbook that has about 14 Tabs with many formulas. I currently have all tabs Unprotected, but would like to invoke a password on this spreadsheet. When I enable a password on this spreadsheet, Excel renders the spreadsheet corrupted. I cannot open the file after an encrypted password has been enabled.
I am using Windows 10 and Office 365 and the file is saved on my hard drive.
The file is save as a xlsx format.
