If the document protection password is set, the document can be viewed, but cannot be edited without entering the correct password.
If you encounter the enter password dialog (see below) when opening the document in Microsoft Word, it means that the document is password-protected.
The specific elements that you can to protect in a document include the following:
Microsoft Word does not use encryption when you protect only specific elements. Office Password Recovery recovers such passwords immediately.
In some cases, the recovered password may be different from the one originally used to protect the document, but will be valid to access the document.