On Proofpoint Digital Discover's Privacy Page you can request and collect all the privacy and GDPR related information that Proofpoint Digital Discover is providing.
The privacy policy by is a legal document or statement that discloses how Proofpoint Digital Discover gathers, uses, discloses, and manges their customers' data.
The basis for Proofpoint sharing, adding, uploading, hosting, accessing or sending personal data out of Europe. Vendors can also add a description of their own impact assessment for data transfers.