Upgrade to Windows Server 2012 from Windows Server 2008 R2

Question

Trying to upgrade Windows Server from 2008 R2 to 2012. On compatibility check throwing an error

Active Directory on this domain controller does not contain Windows Server 2012
ADPREP /FORESTPREP updates. See http://go.microsoft.com/fwlink/?LinkId=113955.

As per the suggested above link did what required; but still throwing same error.

Any helps?

@Nev - just a comment, why so quick to leap into this version, it's VERY new. — Chopper3, Sep 06 '12 at 11:42
Did you do both a domain prep and a forest prep? Have you raised the functional level of the forest and the domain to 2008? — Chris McKeown, Sep 06 '12 at 13:23
@ChrisMcKeown Uh, you can't raise a functional level above the oldest DC on the forest/domain. So that's not going to help him when he can't get all this DCs up to 2012. — HopelessN00b, Sep 06 '12 at 15:47
@HopelessN00b Fully aware of that, but where does Nev state that he has any pre-2008 DCs on the network? — Chris McKeown, Sep 06 '12 at 19:06
Not really necessary to raise it to 2008 though, I see that 2012 supports a functional level of 2003. — Chris McKeown, Sep 06 '12 at 19:12
@ChrisMcKeown: Yes functional level both forest/domain are raised to 2008 R2. — Nev_Rahd, Sep 06 '12 at 22:42
The only other thing I can think of is whether you ensured that the user account running the adprep/forestprep was a member of the Schema Admins group. — Chris McKeown, Sep 06 '12 at 22:46
@Chris Mckewon: Yes the user was a memeber of the Schema Admins group. — Nev_Rahd, Sep 06 '12 at 22:55

score 7 · Answer 1 · answered Sep 07 '12 at 17:36

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@Nev, I had the same error. The Microsoft link suggest to use the Windows 2008R2 disc, however the updates are on the 2012 disc. For me the solution was to perform the Microsoft solution with the Windows 2012 disc and reboot. The same goes for the ADPREP /DOMAINPREP updates.

answered Sep 07 '12 at 17:36

Bas Truren

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+1 for this answer - I did not need to reboot though. – Michael Mortensen Sep 16 '12 at 12:03

score 7 · Answer 2 · edited Oct 12 '12 at 16:45

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Just cd to support\adprep on the Windows 2012 media and run:

adprep /forestprep
adprep /domainprep

edited Oct 12 '12 at 16:45

Bill the Lizard

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answered Sep 21 '12 at 14:28

kamal

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I can confirm this also works for the Windows Server 2016 to Windows Server 2019 in-place upgrade. I couldn't `cd` into the ISO, so I had to unpack it to disk first, then `cd` into it and it worked. – JJJ Apr 30 '19 at 16:55

score 1 · Answer 3 · answered Sep 21 '12 at 14:36

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You run adprep /forestprep from from 2012 media on the DC holding the Schema Master role in your forest. Then, you run adprep /domainprep and adprep /gpprep from the 2012 media on the DC holding the Infrastructure Master role in the domain that you're putting the 2012 DC in.

answered Sep 21 '12 at 14:36

MDMarra

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is adprep /gpprep needed? – dataCore Jan 16 '15 at 12:45
@dataCore it wasn't for me – Matthieu Apr 10 '20 at 15:10

score 0 · Answer 4 · answered Jan 09 '17 at 10:56

0

I just want to add that if the error still appear after doing the adprep /forestprep adprep /domainprep It could be a problem in replication between the DCs (which was in my case) so also check the replication

answered Jan 09 '17 at 10:56

Frs

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Upgrade to Windows Server 2012 from Windows Server 2008 R2

4 Answers4