This feature is only available in Professional and Enterprise editions.
With the Search all available folders setting you can choose to have Identity Finder automatically search within all available folders that it finds, including those on an Exchange Server (if you enabled the Searching Remote Mail Folders option), or with the Search only specified folders settings you can choose to have Identity Finder search only within the specific folders you specify.
If you wish to search within only the specific folders that you specify,
click the Select Folders button to open the
Select Outlook and Exchange
Folders dialog box. Please be patient while
this dialog box opens as it will be retrieving the entire list of folders
that it is possible to search.
To view or change these settings, click the Settings button on the Tools and Options ribbon.