At @GottaLaff's request posting a long thread. First, the underlying point:
THE REASON Mueller was able to find emails showing direct ties bt Trump & Russia Trump was lying to cover up was bc Mueller went to Microsoft for Cohen's emails.
That has lessons for the stolen docs investigation.
The FBI Went to Microsoft, not Trump Organization, for Emails Incriminating Individual-1 - emptywheel
Trump Organization hosted its emails with Microsoft. That means the FBI has been able to access emails from Trump's business directly from Microsoft since they put a preservation order on all Trump Organization business accounts in July 2017.