Passwords and logins for Word files or folders

Worth mentioning that if adding a password, make a note of it, as its almost impossible (I suspect) to access the file if the user forgets what the password was. Microsoft also have products such as AD-IRM (Active Directory Info Rights Management) where you can encrypt files without passwords and provide access at an individual level via Active Directory. Might be a bit more than you need but if you've a large number of users that need encryption might be worth looking in to.