Creating Active Directory sites

Would there be any issues within AD environment especially Exchange 2007 connectivity or so if we were to create Active Directory sites. Currently we only have a default-first-site-name with 5 domain controller at different physical locations (3 with Global Catalogs). Unfortunately, we do not have a test environment to test all of this.

Thanks,
afhashmiAsked:
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Mike KlineConnect With a Mentor Commented:
No in fact sites is what you want so that you can have users authenticate to the dcs in their local area.  make sure the site that exchange is in has Global catalogs (make them all GCs if ou can)

Thanks

Mike
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Brian PierceConnect With a Mentor PhotographerCommented:
I can't promise there will be no issues, but having multiple sites with multiple locations is the sensible way to go and will substantially reduce cross-site traffic  and give you a more resilient topology if site links fail.

In order to set-up sites, you must have separate subnets in each location, you then define each site as being one (or more) subnets.
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SandeshdubeySenior Server EngineerCommented:
You won't have any issue,plan to do the same during non business hour. If you are woried you can take the backup of the server and then proceed.

You need to create sites and subnet,associating Subnets with Sites and move the server to respective sites set the replication interval.Also make sure that each sites have atleast one GC if not make all the Server as GC in each site.

Reference link:
http://technet.microsoft.com/en-us/library/cc740187(WS.10).aspx
http://technet.microsoft.com/en-us/library/cc736820(WS.10).aspx
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afhashmiAuthor Commented:
All: thank you for very useful information. Sites have been created and DC's were moved under their respective sites, and it has definitely improved the logon process for users. An issue that I have run into now is that replication is not happening at all. NTDS Setting shows 1 server for each site except for one site that has 4 servers (have total 5 DC's). Shouldn't all DC's be going to the controller in our Data Center for replication? Any suggestions? Thanks,
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Brian PiercePhotographerCommented:
>> Shouldn't all DC's be going to the controller in our Data Center for replication? <<

Not necessarily - windows normally does a good job of working out the most efficient replication topology. If you must, then you can intervene - see http://technet.microsoft.com/en-us/library/cc755994(WS.10).aspx
and http://support.microsoft.com/kb/244368
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afhashmiAuthor Commented:
OK, this makes sense. Is it normal for all the server to show "NONE" under "Change Schedule"?
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