Domain controller taking long time to update other domain controllers?

I have 7 domain controllers.  All domain controllers are in different parts of the county.  When i add a new user on Exchange 2007 server (Win 2003R2) it typically takes hours for the user to show up on the other domain controllers.  How can i speed this up?

Thanks
orlandotommyAsked:
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Mike KlineConnect With a Mentor Commented:
You can check in sites and services, check out my screenshot.

Thanks

Mike
Replication-Interval.png
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Mike KlineCommented:
Do you have different sites setup in AD for those DCs.  Check to see what the interval time is on the site links.  The default time is 180 minutes, you can lower that.

Thanks

Mike
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woolnoirConnect With a Mentor Commented:
And keep in mind if you have a HUB -> SPOKE architecture it will be a cumulative total of all the links between the first site and the other DC's.

Depends a little on your network if you want to allow full mesh replication and have low interval times... maybe with additional info we could assist further.

Mkline71 is right in his assessment though, thats probably the issue.
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orlandotommyAuthor Commented:
How do i check the interval times?
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woolnoirCommented:
Find the site link between two of your sites and look at the properties - it has options for when, and how often replication can occur.
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woolnoirConnect With a Mentor Commented:
i.e

You may have

Site A, Site B and Site C

if you have 3 sites, and a site link inbetween A<->B and B<->C (hub and spoke) and you have say 1.5 hours replication on the links then it could take 3 hours for a change in site A to make it to site C.

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orlandotommyAuthor Commented:
What does "cost" mean?
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TolomirAdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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