Excel’s password protection is a great feature and fortunately, it’s easy to implement. Just don’t confuse it with sheet protection and by all means, don’t rely solely on it to secure ...

This includes adding password protection to your Excel files. Whether you're working with extremely sensitive or privileged data, trying to keep contact details out of the wrong hands, ...

Add password protection by locking the VBA project for viewing. Save the workbook as a macro-enabled file with the `.xlsm` extension. Close and reopen the workbook, enabling content to activate ...

Open the spreadsheet you want to protect in Excel, click the "Review" tab and then click "Protect Sheet" in the Changes group to display the Protect Sheet dialog.

One of the most effective ways to protect your Excel data from unauthorized access is by encrypting your entire workbook with ...

Password-Protect a Word or Excel Document. Hassle-Free PC By Rick Broida, Nov 5, 2008 3:34 pm PST. Most folks have a few documents–legal forms, business records, account spreadsheets, etc ...

I'm going to hazard a guess that it was being saved in compatibility mode in the original excel format. Somebody "updated" it, and the password protect would have died with it.

Quite often there is a situation in which you dont want other users to modify the data stored in your Excel file. It can either be because the data is confidential, or the fact that you simply do ...