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Licence issues when ppgrading to Server 2003 r2

Posted on 2009-06-30
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Last Modified: 2012-05-07
I've recently purchased a new server for our rack (8 already in it) with the intention of creating an additional DC.  Problem is that the new server is using r2 and is "a compatible forest", therefore I need to upgrade our exsisting DC to r2 so the forest (and other structures) are compatible.
The r2 disk is seperate from the Server disk and will upgrade our current DC.

The questions are:
If I upgrade the current DC to r2 and I going to get problems with the other servers on the domain?
Should I upgrade them all (they are all Server 2003)?
What are the licence implications to my exsisting servers?

Thanks in advance
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Question by:Mike Twist
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oBdA earned 2000 total points
ID: 24743110
No, you can upgrade away. You can upgrade the other DCs, but there's no immediate need to do so.
You actually don't even need to upgrade your current DC (though the upgrade to R2 itself is usually rather harmless), it's enough to update the AD Schema to be able to join the new DC.
Licensing will be fine (if it was until now), R2 uses the same CALs as W2k3.

Steps for Extending the Schema
http://technet.microsoft.com/en-us/library/cc773360(WS.10).aspx

Error message when you run the Active Directory Installation Wizard: "The version of the Active Directory schema of the source forest is not compatible with the version of Active Directory on this computer"
http://support.microsoft.com/kb/917385
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by:Mike Twist
ID: 31598253
Thanks very much. I suspected as much, but I just wanted confirmation before pressing on with the update.  I've had a closer look at extending the schema but i've decided to update to r2.

Thank.
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Expert Comment

by:oBdA
ID: 24743653
Note that the Schema extension is a precondition before you can upgrade your current DC to R2; there's no way around it.
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