Here is what he found. In an eight hour period Windows 10 tried to send data back to 51 different Microsoft IP addresses over 5500 times. After 30 hours of use, Windows 10 sent his user data to a whopping 113 IP addresses which he has listed in the thread.
CheesusCrust has more surprises for us. He then repeated his test on another Windows 10 clean installation with all data tracking options disabled. Only this time he installed a third party tool called DisableWinTracking (available on GitHub), which is supposed to stop Windows 10 spying attempts including the hidden ones.
On this DisableWinTracking installed PC, CheesusCrust found that at the end of the 30 hour period Windows 10 had still managed report back his data to Redmond based servers a whopping 2758 times to 30 different IP addresses.