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error migrating windows 2003 domain


I have been migrating a domain controler from a windows 2003 server sp1 to a windows server 2003r2 sp2, when i try to execute dcpromo on my windows 2003r2 server it stops due an replicating error, it says that it can´t replicate because the forest isn´t prepared to install windows 2003, i have verified that adprep /forestprep and adprep/domainprep has been executed executing them again. I have seen nothing in the event viewer.
My domain functional level is windows 2000 mixed and the forest functional level is windows 2000 and it has a windows 2003 server working now as domain  controller.
Could anyone help me?.
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2 Solutions
Camel0tAuthor Commented:
I´ve found that i need a different version of adprep other than the one that i´ve got in my cd.


ADPrep.exe tool for Windows Server 2003 R2 is 5.2.3790.2075.
Mike KlineCommented:
So what you need in this case is adprep from disk 2 of the 2003 R2 disk.

You can also check your schema.  When you are done you will be at 31 for 2003 R2


On another note, have you thought about going to 2008 R2 at this point?


Camel0tAuthor Commented:
At this moment we are planning to remove the oldest server and migrate all the functions to the newest server.
Camel0tAuthor Commented:
As the link shows the problem is the version of adprep, who is in the second installagtion cd of windows 2003r2
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