Hello everyone,
Our client PCs are no longer synchronizing their time with the domain controllers. We have a GPO that was working just fine, but we took the domain controller it was referencing offline which obviously messed up the time sync. We attempted to simply switch the name of the domain controller with a different one under Computer Configuration > Policies > Administrative Templates > System > Windows Time Service > Time Providers > Configure Windows NTP Client, but the change didn't seem to make a difference.
Here are the other details of the Configure Windows NTP section of the GPO:
NtpServer: DCDNSname,0x1
Type: NT5DS
CrossSiteSyncFlags: 2
ResolvePeerBackoffMinutes: 15
ResolvePeerBackoffMaxTimes: 7
SpecialPollInterval: 3600
EventLogFlags: 0
Also, the setting "Enable Windows NTP Client" below "Configure Windows NTP Client" is Enabled.
I have spent several hours googling possible solutions such as running commands like...
w32tm /config /manualpeerlist:time.windows.com /syncfromflags:manual /reliable:yes /update on the domain controller in question, but nothing seems to work right. Attempting a w32tm /resync command on the client PC yields "The computer did not resync because no time data was available." Other commands I attempted were "w32tm /config /syncfromflags:domhier /update" followed with "net stop w32time" and "net start w32time" on the client.
Another thing to mention is that using the gpresult command to look at the GPOs shows that the time policy is applied, but then under "The following GPOs were not applied because they were filtered out" it's listed again as "Filtering: Not Applied (Unknown Reason)".
My next step was to create a test GPO and start from scratch, but I need some backup if that fails.
Thank you.