I am looking for a solution (if it exists) beyond hidden and very hidden worksheets. I have a document that is circulated internally within the organization but it has happened multiple times that a clumsy employee has CC'd an outsider in their email and this information has been made available to the outside world. I currently have an encrypt/decrypt add-in that renders the crucial info (in one column) useless but usually the unencrypted version goes out of the company due to sloppy work.
Is there a way/method to create a bulletproof file, or just a very hard to break into type of Excel workbook? It will contain certain numbers and financial information that our company employees can access (with a password) but should be useless if someone has access to this file but doesn't have the password. Any suggestions are welcome because time and time again I've had my hard work leaked to outsider eyes.
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