This policy setting controls analysis of sent e-mails to identify commonly e-mailed recipients and commonly discussed topics. ...

This policy setting controls analysis of sent e-mails to identify commonly e-mailed recipients and commonly discussed topics.  This information is uploaded to the default SharePoint My Site.

If you enable this policy setting, SharePoint Portal Server Colleague Import is turned off.

If you disable or do not configure this policy setting, SharePoint Portal Server Colleague Import is turned on.