On my NVR DS-7732NI-M4-24P, on the the 'Time Configuration' part, I can choose between the following NTP Servers or put my own one in:
time.windows.com
time.google.com
time.apple.com
My Preferred DNS server = 8.8.8.8
Alternative DNS Server = 1.1.1.1
When I choose 'time.windows.com' and press...