My domain controller was set up as whatever type of time server it is by default. It's the PDC. I ran: net stop w32time w32tm /config /syncfromflags:manual /manualpeerlist:time.nist.gov w32tm /config /reliable:yes net start w32time Which to me says use the NIST time servers and consider them reliable. Does the following output look correct? I'm not completely sure what I'm looking at, but it does appear to be using time.nist.gov as its ntp source (NtpServer Enabled=1) Should this PDC still be an NTP Client as well? (NtpClient Enabled=1) C:\>w32tm /query /configuration /verbose [Configuration] EventLogFlags: 2 (Local) AnnounceFlags: 5 (Local) TimeJumpAuditOffset: 28800 (Local) MinPollInterval: 6 (Local) MaxPollInterval: 10 (Local) MaxNegPhaseCorrection: 172800 (Local) MaxPosPhaseCorrection: 172800 (Local) MaxAllowedPhaseOffset: 300 (Local) FrequencyCorrectRate: 4 (Local) PollAdjustFactor: 5 (Local) LargePhaseOffset: 50000000 (Local) SpikeWatchPeriod: 900 (Local) LocalClockDispersion: 10 (Local) HoldPeriod: 5 (Local) PhaseCorrectRate: 7 (Local) UpdateInterval: 100 (Local) FileLogName: (Undefined or NotUsed) FileLogEntries: (Undefined or NotUsed) FileLogSize: 0 (Undefined or NotUsed) FileLogFlags: 0 (Undefined or NotUsed) [TimeProviders] NtpClient (Local) DllName: C:\Windows\system32\w32time.dll (Local) Enabled: 1 (Local) InputProvider: 1 (Local) CrossSiteSyncFlags: 0 (Undefined or NotUsed) AllowNonstandardModeCombinations: 1 (Local) ResolvePeerBackoffMinutes: 15 (Local) ResolvePeerBackoffMaxTimes: 7 (Local) CompatibilityFlags: 2147483648 (Local) EventLogFlags: 1 (Local) LargeSampleSkew: 3 (Local) SpecialPollInterval: 3600 (Local) Type: NTP (Local) NtpServer: time.nist.gov (Local) NtpServer (Local) DllName: C:\Windows\system32\w32time.dll (Local) Enabled: 1 (Local) InputProvider: 0 (Local) AllowNonstandardModeCombinations: 1 (Local) EventLogFlags: 0 (Undefined or NotUsed) VMICTimeProvider (Local) DllName: C:\Windows\System32\vmictimeprovider.dll (Local) Enabled: 1 (Local) InputProvider: 1 (Local) Thank you!

Hi Willmeister, By default, the primary domain controller (PDC) emulator gets its time from the BIOS clock. In a network with a single DC, that DC automatically has this role. If you would like to configure the domain controller to sync with an external source, please refer to Synchronize the Time Server for the Domain Controller with an External Source. Also, we can refer to How to configure an authoritative time server in Windows Server. Hope this helps. Jeremy Wu TechNet Community Support

Hi Willmeister, By default, the primary domain controller (PDC) emulator gets its time from the BIOS clock. In a network with a single DC, that DC automatically has this role. If you would like to configure the domain controller to sync with an external source, please refer to Synchronize the Time Server for the Domain Controller with an External Source. Also, we can refer to How to configure an authoritative time server in Windows Server. Hope this helps. Jeremy Wu TechNet Community Support