We just had a summer daylight change in US. and pc's on my network are behaving strange, some of them change time and some didn't.
My network: 2 locations both in Midwest, same time zone. Location 1: 120 pcs (windows xp & windows 200) , with 1 Active Direcotry Domain Controller on Windows 2003 Standard. A couple of windows 2000 servers (they up to date) the rest of the servers are Xen or Debian machines (all up to date) , Second location connected through OpenVPN link all pc's are running fine – but they are all connecting to our AD domain controller. Locaiton 2: 10 pcs, and a shared LAN NAS. Both of the routers/firewalls in both locations are pFsense boxes with ntp service running – but it's up to date.
Tried all the usual suspects:
- I have all the latest updates
installed - restarted them
- domain controller is running fine
- most computers are running fine
- I have only one domain controller on my network
- also my firewall serves as ntp server (pfsense) but it's up to date.
- all of the linux machines are fine since they are querying firewall / router for the time.
about 1/3 of my pcs are 1 hour behind. If I change them manually they just change back ( the way domain pc's are supposed to).
I've tried everything but I can't think of anything else to try.
Best Answer
Time synchronization has nothing to do with time zones. Windows time synchronization and internal time is always UTC.
Check the following registry key on the clients that aren't updating to ensure they have the correct registry values. You can compare it to a computer that has the correct time zone.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\