2003 AD to 2008 AD

I have three 2003 DCs and will upgrade AD with new windows 2008 servers.
I will run forestprep.exe. and adprep.exe to upgrade. Since I only have a single domain, I can run this once.
My questions is that what about exchange server? Currently 2003 exchange server on windows 2003 server as member of domain. After I upgarde AD, will it work automatically? Is there any tools that allow me to examine the connections with new AD? I will have both 2003 and 2008 servers for a month and will dcpromo to remove DC from 2003 servers and retire it.
Thanks in advance
KseanAsked:
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AmitIT ArchitectCommented:
It will not going to cause any issue for Exchange server. I am also running with same setup. Just introduce new 2008 ADC server in the current env.
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Stelian StanNetwork AdministratorCommented:
By doing that you just update the schema so you should be fine.
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Darius GhassemCommented:
You need to have at least SP2 installed on the Exchange server this is a best practice. You should be good though if you already have this installed.

Here is a migration guide to Windows 2008 server

http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/Windows_Server_2008/Q_23665224.html

Here is an article on changes with adprep in Windows 2008 Server R2.

http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/Windows_Server_2008/A_3644-Windows-2008-Server-R2-adprep-adprep32.html
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KseanAuthor Commented:
I have just checked the exchange server which has still server 2003 sp1. do I update to sp2? is there any docs for this from MS? so I can prove this to my boss.
Thanks
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Darius GhassemCommented:
Exchange Server 2003 Service Pack 2, Exchange 2007, and Exchange 2007 SP1 (when released) are supported in environments that either partly or entirely use writeable Windows Server 2008 directory servers.

http://blogs.technet.com/b/exchange/archive/2008/03/05/3403679.aspx

Matrix

http://technet.microsoft.com/en-us/library/ff728623.aspx

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KseanAuthor Commented:
How about windows server? I have server 2003 sp1 as a member server. This will be OK with 2008 AD?
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Darius GhassemCommented:
That will be fine but I still recommend installing SP2 there are lots of fixes in SP2.
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AmitIT ArchitectCommented:
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AmitIT ArchitectCommented:
Sorry wrong link posted above. Below is the correct link
http://www.scribd.com/doc/2390331/2003-to-2008-Active-Directory
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