In Maximizer, open an "Address book" window
Select companies or individuals to export (if you want to export all entries, don't select anything)
Click the "Maximizer" button (top-left corner) and select "Import/Export/Transfer"
Under "Export", select "Address Book entries"
From the Format drop-down list, select "XML"
Specify the destination location and file name for the exported file
In the "Save as type" drop-down list, select either "MXI" or "XML"
Select any of the Export options, as needed.
Once you get the file, upload it to your Dropbox
*This instruction was taken from "Export Address Book Entries in XML Format" section of the "Administration for Maximizer" chapter of Maximizer CRM User's Guide.