The password can be up to 15 characters long and case-sensitive. In the New password box, type your new password. Your Outlook folders are already protected by your Exchange password. Note: This button does not appear if your email account runs on Microsoft Exchange. You can't set a password for individual folders within the Outlook Data File (.pst). When you set an Outlook Data File (.pst) password, it's set for the entire file. If your Microsoft Windows user account is password protected, and no other person has access to your Windows user account, you can select the Save this password in your password list check box after you verify your new password. Your computer can remember your password so that you don’t have to type it in each time you open the Outlook Data File (.pst). Keep any password you write down in a secure location, away from the information that it helps protect. If you forget it, Microsoft can't retrieve it. It's critical that you remember your password. A longer and more complex password helps improve password protection.

Note: Use strong, case-sensitive, passwords that include a mix of a minimum of eight uppercase and lowercase letters, numbers, and symbols such as Y6dh!et5.

Password lock a folder