Julie Brill, Mirosoft chief privacy officer and corporate VP for global privacy and regulatory affairs, explained.
Don't you mean "privvy officer"?
"As a processor, Microsoft ensures the integrity and safety of customer data, but that data itself is owned, managed and controlled by the customer."
Coz you know that's all a load of crap.
MS will 'check the integrity' by going through it with a fine-tooth comb, and will ensure it's safety by snaffling a copy of it for as long as they can possibly manage to keep it and give anyone trying to remove their data the run around.