Greetings,
In order to access your PDF articles from EndNote for iPad without manually uploading file attachments to EndNote online, you’d need to allow EndNote X7 to create relative links so that the PDF articles were copied to the .Data folder that corresponds with your EndNote library. Without using relative links, your file attachments cannot be automatically synced with your EndNote online account and by extension would be unavailable from EndNote for iPad.
Even if you choose to allow EndNote to create relative links to your file attachments, the PDF articles would need to be manually downloaded from EndNote for iPad. EndNote library file attachments are not automatically downloaded within EndNote for iPad in order to minimize bandwidth usage and storage space on the device. We have an existing enhancement request to include a ‘download all attachments’ option within EndNote for iPad - i’ll be sure to add your comment to that product enhancement report.
Please let me know if this helps.