Caveat emptor: it is called Customer Data Return for a reason. Not all the data can be extracted- for example customizing tables. Some application tables are also out of scope- user tables like USR21, USR02 and the like. Only data which SAP consider ...

It seems not all of them are 

Dear Ulrich, Any updates on this? Many thanks, Milen

katharina.reichert Dear Katharina, Are there any updates about S4HANA Public Cloud integration? Thank you, Milen