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After extending the schema to R2 can I have non R2 2003 server and 2000 servers int he domain?

Posted on 2008-11-06
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The schema master is Windows Server 2003 R2 with SP2 and we plan to extend the schema to R2.  We have several Windows Server 2003 SP1 and SP2 servers that are planned to become Domain Controllers and we have 1 2000 SP4 Server that is already a DC.  After we extend the schema so we have to upgrade all these server to R2, or will the domain function just fine without doing so.  Also, will upgrading the existing 2003 SP2 servers to R2 require an additional license for the R2 license (purchase)?  The 2000 DC is going away before this switch over so that is not an issue.  Thanks!
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Question by:tmasters2876
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by:Pete Long
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No you can still have non R2 DC's its just the schema version that gets updated :)
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Pete Long earned 500 total points
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in fact you need to run the command on a non R2 server to upgrade the schema before you can have an R2 domain controller so if it were not possible to have an "R1" DC you could never have ran the upgrade :)

Performing the upgrade.

1. Pop in the CD and run d:\i386\winnt32.exe /checkupgradeonly
2. If you have the FAX service running on any DC stop and disable it.
3. Make sure your system is backed up (thats system state too! And its a good idea to make some recovery disks?)
4. Clear down all the event logs reboot everything and recheck the logs.
5. Go to the Schema Master server and run adprep /forestprep without the quotes.

NOTE with Server 2003 R2 adprep is on the SECOND CD in the \cmpnents\r2\adprep directory.

6. It will take a while to run and the network will slow down while it does.
7. When its finished locate your infrastructure master server, (run active directory users and computers > right click the domain > operations masters > infrastructure)
8. Go to the infrastructure master server and run adprep /domainprep 
9. This runs quite quickly, when its finished run adprep /domainprep /gpprep 
10. Wait for full active directory replication to occur. Force replication if needs be but DONT do anything for at least half an hour  longer if its a client with a lot of sites)
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by:tmasters2876
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Thanks!  How about upgrading to R2 for the SP2 servers?  Can I just run the second cd and use the existing product key, or will we need to purchase an additional R2 license?
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by:Pete Long
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>>Thanks!  How about upgrading to R2 for the SP2 servers?

don't even worry about it just put SP2 on your "R1" servers :)
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