On Microsoft Compliance Manager's Privacy Page you can request and collect all the privacy and GDPR related information that Microsoft Compliance Manager is providing.
The privacy policy by is a legal document or statement that discloses how Microsoft Compliance Manager gathers, uses, discloses, and manges their customers' data.
The basis for Microsoft 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.