Microsoft Office Questions? Ask a IT Expert for Support ASAP
Hello! I am happy to assist.
The only best way to secure those type of documents that are supported by Microsoft are to use an Encryption password ***** even rights to disable Editing.
Follow the steps in this tutorial to show you how: https://support.office.com/en-us/article/Add-or-remove-protection-in-your-document-workbook-or-presentation-05084cc3-300d-4c1a-8416-38d3e37d6826