Downloading OutLock for Outlook 1.2 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. The program is included in Communication Tools. The most popular version of the software is 1.2. This free software was originally developed by TPS EDV-Dienstl. GmbH.
From the developer:
OutLock is an add-in for Microsoft Outlook 2000/2002 (XP)/2003 which enables you to encrypt and decrypt message items with a single click to protect your privacy. If you want to keep messages in your Outlook information store (eg. PST-File) safe you can protect the store by using a password. However there are several tools around the net which are able to recover the the password for a PST-File.
You may want to check out more software, such as Export Live Mail Contacts to Outlook, CubexSoft Outlook Export or Windows Live Mail Export Contacts to Outlook, which might be similar to OutLock for Outlook.