In my environment, there are thousands of clients and servers. suddenly all windows server 2003 systems time get back 1 hour. all other systems are ok.
there are 3 time-related policies, 1st for DCs to get time from NTP, 2nd for clients and servers to get time from DCs, and the 3rd one for time zone configuration through registry.
there is no related error in the event viewer.
registry keys are in 3rd policy in preferences and on 2003 servers CSE is installed and get the updates without any problem (I checked: I deleted one of the registry keys and after gpupdate it appeared)
in the below pictures you can see "w32tm /tz" command shows correct information on windows 10 but in 2003 systems DoW is showing 4 instead of 2. which means it will happen on Thursday instead of Tuesday. right?
I have installed tzedit.exe on 2003 servers and it shows the correct time zone and correct date for time shift. I even tried to replace the reg key from TZI reg_binary to dynamic DST value (after tzedit configuration) but no luck.
now the questions:
when every registry configurations are the same, and all systems are getting the config from the same GPP, why 2003 shows different information?
in 2003 systems DoW is 2 days after other systems. why the time shift happened 4 days before 21st September? it should happen on Thursday instead of the correct date (Tuesday 21st September)