SPAM Folder
This option is used to set the Outlook folder to which the toolbar will move mail messages that have been identitfied as SPAM. This folder is set as part of the startup sequence when first running the toolbar after installation.

Clicking the 'Set' button allows you to specify the Outlook Folder to which you would like all emails considered to be SPAM moved. You can also create a new Outlook Folder especially for them if you want to.