Configure Windows NTP Client: Enabled (policy settings are described below)
Enable Windows NTP Client: Enabled
Enable Windows NTP Server: Enabled
NtpServer: us.pool.ntp.org.0x1, 1.us.pool.ntp.org.0x1, 2.us.pool.ntp.org.0x1, 3.us.pool.ntp.org.0x1
Type: NTP
CrossSiteSyncFlags: 2
ResolvePeerBackoffMinutes: 15
Resolve Peer BAckoffMaxTimes: 7
SpecilalPoolInterval: 3600
EventLogFlags: 0
https://blogs.technet.microsoft.com/askds/2008/11/13/configuring-an-authoritative-time-server-with-group-policy-using-wmi-filtering/