Windows 2003 domain to 2012R2

I am trying to promote Windows 2012R2 to be domain controller from Windows 2003
But the system tells me I need to upgrade the forest from 2000 to 2003 but I cannot find out how.
soffcecManagerAsked:
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Joseph MoodyBlogger and wearer of all hats.Commented:
In Active Directory Domains and Trusts, right-click Active Directory Domains and Trusts , and then click Raise Forest Functional Level
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Dirk MareSystems Engineer (Acting IT Manager)Commented:
Please make sure you don't have any Server 2000 DC in your organization.

But as previously stated raise the forest and domain functional level to 2003.

Please below YouTube videos.
http://www.youtube.com/playlist?list=PLKlE0kYFlqeaLHDtb7CfxcXoNpr4JM0Mz

DirkMare
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soffcecManagerAuthor Commented:
When I try this I get "The functional level could not be raised. The error is: The directory service is busy."
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Dirk MareSystems Engineer (Acting IT Manager)Commented:
Have tried to upgrade the functional levels again? This is normally just a temporary issue and resolves itself. What are you seeing in your event logs?

DirkMare
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soffcecManagerAuthor Commented:
I have 2 orphan domain controller on my network, do need to remove them before ?
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Dirk MareSystems Engineer (Acting IT Manager)Commented:
How long have they been disconnected? Are they currently tombstoned?

Yes if they are no longer working demote them see if you can cleanly remove them before you force it.

And if you force remove them,you will need to clean up AD and DNS.

DirkMare
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Windows Server 2003

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