Sync Time between parent domain and child domain

Hi Experts,

I'm having a problem with sync time between parent domain and child domain.

How can I do to configure is well?

Check one of the many problems that I have because of this issue:

C:\Users\Administrator>repadmin /replsum
Replication Summary Start Time: 2010-04-16 14:30:47

Beginning data collection for replication summary, this may take awhile:

Source DSA          largest delta    fails/total %%   error
 CHLD01                    38m:09s    1 /   4   25  (1398) There is a time and/o
r date difference between the client and server.
 DC01                  04h:39m:41s    0 /   4    0

Destination DSA     largest delta    fails/total %%   error
 CHLD01                04h:39m:41s    0 /   4    0
 DC01                      38m:44s    1 /   4   25  (1398) There is a time and/o
r date difference between the client and server.

Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Mike KlineCommented:
How do you have time setup in your forest?  Do you have the PDC emulator in the root pointing to an external and/or reliable source then letting the windows time hierarchy take over from there?

Tigermatt has a great blog entry on how it should be setup

What do you get if you run   w32tm /monitor  | find /i "NTP:"


abolinhasAuthor Commented:
Check the output
C:\Users\Administrator> w32tm /monitor  | find /i "NTP:"
    NTP: +0.0000000s         RefID:  [0x00000000]
Mike KlineCommented:
what about just w32tm /monitor

Do you have things setup like Matt outlined?
Determine the Perfect Price for Your IT Services

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden with our free interactive tool and use it to determine the right price for your IT services. Download your free eBook now!

abolinhasAuthor Commented:
C:\Users\Administrator>w32tm /monitor
chld01.evora01.florasul.lan *** PDC ***[[fe80::8537:7804:3ad6:c900%11]:123]:
    ICMP: 0ms delay
    NTP: +0.0000000s offset from chld01.evora01.florasul.lan
        RefID: (unspecified / unsynchronized) [0x00000000]
        Stratum: 0

Reverse name resolution is best effort. It may not be
correct since RefID field in time packets differs across
NTP implementations and may not be using IP addresses.
abolinhasAuthor Commented:
I found this issue on server, if I do net time \\ /SET /YES the server sync the time with parent domain, but after one hour he unsynchronize again.

For example: When I Sync the time sync to 22:00:00 but after one hour or less he unsynchronize to 19:00:00.


André Bolinhas

abolinhasAuthor Commented:
Hi mkline71,

This article fix my problem

Thanks for your help

Best regards

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Active Directory

From novice to tech pro — start learning today.