If you don't have the root PDC pointing at an external source such as time.windows.com or tick or tock or something else, the time of your entire forest is dependent on the variability of the clock on your PDC. As much as it drifts, so will the time of your entire forest.
 
Again, if computers were good at maintaining time, you wouldn't need a time sync service, you would set them once and they would always be fine.
 
You *need* to sync to some other source or you *need* to expect deviation. At worst you need to manually view and adjust the clock on the root PDC every morning.
 
 joe


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sharif Naser
Sent: Tuesday, February 22, 2005 2:37 AM
To: [email protected]
Subject: RE: [ActiveDir] win32 time service in domain controllers

Guys,

 

My network is simple two domain controllers( win 2000). Pdc is the my time server for the domain. Now why my domain controllers time changed to 5 minutes late.  Is this normal or could happen. What are the causes?

 

 

Regards,

 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Saleem, Mohamed Yunus
Sent: Tuesday, February 22, 2005 10:22 AM
To: [email protected]
Subject: RE: [ActiveDir] win32 time service in domain controllers

 

I believe that domain controller which you use as the time source to sync other DCs will be monitored and time adjusted to suit the correct time.

 

I have made one server to sync with time.windows.com. Then let all other servers including DCs to sync with this one server. Internally my time server is that server which syncs with the external time source.

 

There are other time sources externally from where you can sync your server. The info is at

http://support.microsoft.com/default.aspx?scid=kb;EN-US;q262680

 

in our environment sometimes I do get serious problems with the XP clients as they are out of time sync with the DC.

 


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sharif Naser
Sent: Tuesday, February 22, 2005 10:11 AM
To: [email protected]
Subject: RE: [ActiveDir] win32 time service in domain controllers

 

My domain controllers synchronize with the system clock of one of the domain controllers. No external time source servers

 

Regards,

 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of joe
Sent: Tuesday, February 22, 2005 10:05 AM
To: [email protected]
Subject: RE: [ActiveDir] win32 time service in domain controllers

 

You don't specify what system clock is off by 5 minutes but for fun I will assume all system clocks in your forest. To that I ask... Are you syncing your forests to an external authoritative source? There is a time service available because computers tend to not keep time all that great and need constant adjustments. You do this by pointing a couple of your forest root DCs (specifically anything that can become the PDC of the root domain) to some external authoritative source and then let the rest of your environment autosync to (eventually) these servers.

 

  joe

 


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sharif Naser
Sent: Tuesday, February 22, 2005 1:47 AM
To: [email protected]
Subject: [ActiveDir] win32 time service in domain controllers

Hello experts,

 

I set the time properly in my domain controllers & after one month the system clock is late by 5 minutes.

 

How could this happen, how do I make sure this will never happen again.

 

Regards,

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