Windows Server 2008 R2 Time Sync Issues

Anthony6890
Anthony6890 used Ask the Experts™
on
Hi all,

I've read many articles about this on the internet, but I haven't really found a definitive answer about my problem.  The time on my server is about 5 minutes off from the microsoft time server and I would like to have my time sync to that.  I don't really know how to do this effectively.  Can someone help me with this problem?

-Anthony
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Lee W, MVPTechnology and Business Process Advisor
Most Valuable Expert 2013

Commented:
why do you want to sync to MS time server when you're on the east coast?

Not sure if you're anywhere near NY, but I use sundial.columbia.edu for my NTP server.  

Are you running your FSMO Master DC in a VM?  If so, make sure it's not configured to sync time from the host - that overrides the NTP time sync.

Author

Commented:
I had said the ms time server because on one of the articles I read on technet they had said to use it.

To answer your question, yes I am on the East Coast.

My DC is in a VM.  I will have to check those settings, I didn't really think about that.
Technology and Business Process Advisor
Most Valuable Expert 2013
Commented:
This is a common problem - check the VM settings - there should be a checkbox or similar to "sync time from host" - disable that - then the DC (assuming it's your FSMO master) should sync it's time from the correct time source.  In turn, (if windows) your VM Host should sync with the VM instead of the other way around.
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Author

Commented:
Ok, so I found it, but it doesn't seem to be update the time.  I"m still off by 4 minutes...
Lee W, MVPTechnology and Business Process Advisor
Most Valuable Expert 2013

Commented:
> but it doesn't seem to be update the time

What does this mean?

Make sure it's NOT syncing from the host system and then either give it time or manually update the time on the DC.  It should sync IF the DC is the FSMO role PDC Emulator holder.

Author

Commented:
Hey, this morning when I logged on, the times were correct!  I have it synced up correctly like you stated in the first solution.  I guess it just takes a little while for the time to actually sync- not really an instant change.

Thanks again for your help!

-Anthony
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
Are any of your DCs on physical boxes? If they are then set them up to pull time from pool.ntp.org. Then set up your hosts and guests to pull from that DC. Allow firewall exceptions for NTP inbound on that DC.

If all DCs are VMs then set up one of the physical hosts to poll pool.ntp.org for time and then set the VMs to poll the host. Again set the firewall accordingly.

http://blog.mpecsinc.ca/2011/01/hyper-v-preparing-high-load-vm-for-time.html

We have had a lot of pain over the time skew situation for VMs.

The above methods work for us. In some cases we drop in an HP MicroServer with Win2K8 R2 running as a DC and set it up to poll pool.ntp.org and then have all VMs poll it for time.

The problem has to do with the polling frequency needed as indicated in the blog post. Do that to ntp.org's servers and they will pass along the Kiss-Of-Death packets basically killing the ability to poll their servers for time.

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