After you generate your documents using Nintex Drawloop Document Generation, you’d like to store it in Dropbox. Currently, there is no integration between Nintex and Dropbox.
The workaround is to use the free service, www.sendtodropbox.com. This website creates a unique email address to your Dropbox account. Once you’ve created your account and received the email address, create an ‘Email’ Delivery Option on your DocGen Package and put the email address in the ‘Additional To’ field. When you generate your document and send via email to this address, the file will be delivered to your Dropbox.