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Error code: 0x57 running Adprep on Windows 200 server

Posted on 2011-02-17
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Last Modified: 2012-06-27
I have a Windows 2000 SP4 Domain Controller and am trying to prepare the forest and domain for a new Windows Server 2008 R2 server which will become the domain controller.  When I run adprep32 /forestprep I am getting the following error:

"Adprep was unable to retrieve information from the local active directory domain controller
[User Action]
Verifiy that the local directory object exists and is accessible.
Adprep encountered a Win32 error.
Errror code: 0x547 Error message:  The parameter is incorrect."

This is the only DC in the environment so it holds all FSMO roles.
I have attached the adprep log file.

Thanks

 ADPrep.log
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Question by:RickFerr
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Expert Comment

by:brota
ID: 34918090
were you logged in as a Schema admin?
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Author Comment

by:RickFerr
ID: 34918248
Yes, I am logged in as the domain administrator who is a member of the schema admins group.
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brota earned 500 total points
ID: 34918324
is the server pointing to any non Active directory dns servers?
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Author Comment

by:RickFerr
ID: 34918415
Yes, actually, it is pointing to the router for DNS and to 4.2.2.2.
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Expert Comment

by:brota
ID: 34918418
do you have a underscore in your domain name or domain controller name?
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Expert Comment

by:brota
ID: 34918430
take the dns out and point to your AD dns only
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Expert Comment

by:brota
ID: 34918436
if you need an outside dns set up forwarders on your dns servers
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Author Comment

by:RickFerr
ID: 34918482
Ok, I will modify DNS settings and yes, there are two underscorse in the server name as well as the server name being 20 character long.  
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Assisted Solution

by:brota
brota earned 500 total points
ID: 34918489
most likely dns.
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Author Comment

by:RickFerr
ID: 34918574
Ok, after modifying DNS I get further but now end up with Adprep has been stopped.  The forest has not been completely prepared.  Error code 0x4c7: The operation was canceled by the user.
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Expert Comment

by:brota
ID: 34918613
I saw this online check these values they should be as follows

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NTDS\Parameters
DWORD "Correct Missing Objects"=1
DWORD "Schema Delete Allowed"=0
DWORD "Schema Update Allowed"=0
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Author Comment

by:RickFerr
ID: 34918752
Ok, actually a mistake on my part.  I needed to hit "C" then "Enter" to continue with the adprep command.  Once I did that, adprep ran and successfully updated the forest info.  So the issue there was definitely DNS.  When I run adprep /domainprep I am getting the message that I must configure the domain to run in native mode.  Do you know if this change will impact users currently connected to the DC or impact any other functions currently running on the DC?
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Expert Comment

by:brota
ID: 34919704
as long as you dont have any NT domain controllers going to native mode should not affect anything.
I do not recall any user errors going to native mode.
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