A family of Microsoft word processing software products for creating web, email, and print documents.
In Word 2013, create a template (or multiple templates for different kinds of documents) and save it with the .dotx extension. On the Review tab of the ribbon, click the bottom half of the Track Changes button and click Lock Tracking. (This command doesn't exist in earlier versions.) Enter and re-enter the password, and save the template.
Users should then use the template(s) to create new documents. Those documents will automatically have Track Changes turned on, and it can't be turned off except by clicking Lock Tracking again and entering the password. No macros are needed.
You must use Word 2013 to turn on the Track Changes and lock it on, and the Admin must use Word 2013 to unlock it, but users with Word 2007 or 2010 will be able to use the template and documents based on it.