A PDF containing only the Purchase Order will be emailed to the Vendor after final approval. If you attach any files to the Purchase Order, they will not be included in the email.
However, when you select that your Purchase Order should be automatically sent to the Vendor after final approval, you'll see an additional dialogue to attach files to that email.
Files from both sections (Purchase Order attachments and Vendor attachments) will be pushed to QuickBooks Online. If you need to attach a file to a Purchase Order and send the same file to a Vendor, we recommend attaching this file in the Email to Vendor section only:
The Email to Vendor section can be automatically enabled and checked in the settings by Organisation Administrators.
Please note: It is not possible to attach duplicates (files with the same name). If you want to attach the same file in both sections, you'll need to use a different name for one of them.