I have contacted the sender...only to get this message:
Sorry for the inconveniences.
Our Purchase Order file is too large to be sent directly as an attachment. Purchase/buying terms and procedures are detailed in the Protected Pdf document like i told you previously in my email.
Due to the size and Security of both parties the pdf file is sent via the New Secured Adobe Document Cloud. You will have to login with your correct email and password combination as prompted by Adobe to access these files.
Thank you and hope to hear from you soon.
Regards
I don't seem able to get a resolution from Adobe either...
that's because it doesn't look like an adobe problem.
but if you want try adobe support, using a browser that allows popups and cookies, contact adobe support during pst business hours by clicking here and, when available, click 'still need help', https://helpx.adobe.com/contact.html