Interesting in itself, not just as regards Trump.
By Emptywheel @ Emptywheel.net, May 26
[....] Microsoft sued over the sheer number of gags on such subpoenas in 2016; few people realized that they were concerned primarily about businesses like Trump Organization, not individual customers. That suit settled on October 24, 2017 after DOJ agreed to provide Microsoft more leeway to notice its customers.
But that agreement would have come too late for Michael Cohen and anyone else at Trump Organization who might have been investigated by DOJ. Since June 21, 2017, Cohen’s emails were preserved, and since July 14, 2017 — just after the June 9 meeting arranged via what appears to be Don Jr’s Trump Organization email became public — all Trump Organization emails have been preserved [....]