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ADPrep / 2008 domain controllers in 2003 forest

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by ben.owen

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Right so we have a 2003 forest which I want to start adding 2008 DC's to. So I run adprep from the 2008 CD on the Schema mater with the /forestprep and then /domainprep switches. Everything runs through perfectly, so I then try and add the 2008 DC in and I get the "you must first prepare to forest using adprep /forestprep" - OK so I go back try and re-run the adprep, but it says it already been run successfully.

I check AD and I have the 2 containers created beneath forestupdate and domainupdates that read cn=windows2007update (Why 2007?) and if I check the schema version number it reads 40 instead of what I believe should be 44. So what the hell has happened?! And is the reason I can?t attach a 2008 DC to the domain?

Anyone else seen this?

Many thanks

Ben

2 replies

by ben.owen

Well looking at the schema.ini file in the adprep folder you can see the entries for the version number 40 and the windows2007update. So I went looking around for other CD's to look at the file and another CD we had was version 44 and the windows2007update is now ActiveDirectoryUpdate. And once I run the adprep again everything was as I would expect and I can now add a 2008 DC ? finally!

Word of warning ? check the 2008 CD?s you have got! I have no idea why we have a very outdated version, I have installed servers with this CD no issues...

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