Frequently Asked Question:
File Attachments
How do I know how many File Attachments a PDF document has? How do I delete them?
It's not currently possible to delete attachments, however, we have added a function called RemoveEmbeddedFile in the latest internal build of our PDF SDK, so this functionality will be available to you soon. We'll post a blog to the first public beta that's available for 7.19 on our PDF blog as soon as it's ready.
You can count the number of existing embedded files in a document using the EmbeddedFileCount function.