Currently there is not a way to export all leads the way you can with deals. To accomplish this, I would like to suggest two possible solutions.

  1. In the Insights tab, the data based on deals has an export button but there is no such option for the lead-based data. With the archived and non-archived data already mixed in these views (differentiated by the "Status" column), adding an export button for them would help in consistency and solve this issue.

       2. In the leads section, include a third button next to Inbox and Archive that shows both types of data. With the export already built into this section, this would also solve the issue and allow this data to be exported.