Help to Protect Your Outlook Information by Using a Password
To help protect the Microsoft Office Outlook information, the user should first create a password for the Microsoft Windows user account, also known as the Microsoft Windows logon password. If multiple people use the same computer, each person should have their own password-protected Windows user account to help secure their individual programs and settings from unauthorized intrusion. There is no logon password for the Outlook program itself. Outlook offers a .pst password feature, which is not very secure, but it can be used to prevent inadvertent intrusion by other people who the user trust and share the computer with, such as one's family at home.