Re: What data did DOJ seek?
The DoJ is not really seeking access to that data, that's not their motive. Their aim is to set legal precedent.
If the DoJ were truly interested in the data itself data they could already have established international mechanisms for law enforcement collaboration. If there was anything to it, MS would have already been served in Ireland with a local warrant and the whole show would have ended there and then as it should, respecting sovereign borders and law.
Instead, they chose an altogether more precarious route which could have fairly major consequences either way. If the DoJ wins this, it's game over for US service providers trying to sell services in Europe because it destroys the basis for renewing the Privacy Shield concept. I am not saying that I considered that basis valid to start with, but it makes it more clear that it's pure BS.