Upgrade 32-Bit (x86) Domain Controller to 64-Bit DC

Hello Expert,
Management told me to upgrade the current domain controllers into the latest version ASAP, but I am very much confused because our current 3 domain controllers (DC1, DC2 and DC3) are 32-Bit windows 2008 Domain Controllers. My confusion is how we can convert 32-Bit windows 2008 Domain Controllers into 64-Bit windows 2012 domain controllers. Most of the upgrading documentation only explains how to upgrade 64-Bit windows 2008 Domain Controllers into 64-Bit windows 2012 domain controllers.
Please help me with a step-by-step process to upgrade 32-Bit windows 2008 Domain Controllers into 64-Bit windows 2012 domain controllers.
The current AD Infrastructure of our company consists of 3 Domain Controllers as follows:-
1)      DC01:-
      Server Name:-DC01
      Architecture:-Physical Server
      Operating System Installed: - Windows Server 2008 SP1 Standard Edition
      Server type: - 32-bit
      Antivirus Installed:- McAfee VirusScan Enterprise +Antispyware Enterprise
      Domain Functional Level:- Windows Server 2008
      Flexible Single Operations Masters (FSMO) running:-PDC Emulator and Relative Identifier (RID) Master
      Server Roles Installed:-
      DNS
      DHCP
      Global Catalog (GC)
2) CUDDC02:-
      Server Name:-DC02
      Architecture:-Physical Server
      Operating System Installed: - Windows Server 2008 SP1 Standard Edition
      Server type: - 32-bit
      Antivirus:- McAfee VirusScan Enterprise +Antispyware Enterprise
      Domain Functional Level:- Windows Server 2008
      Flexible Single Operations Masters (FSMO) running:-Domain Naming and Schema Master
       Server Roles Installed:-
      DNS
      Global Catalog (GC)
3) DC03:-
      Server Name:-DC03
      Architecture:-Virtual Server
      Operating System Installed: - Windows Server 2008 SP1 Standard Edition
      Server type: - 32-bit
      Antivirus:- McAfee VirusScan Enterprise +Antispyware Enterprise
      Domain Functional Level:- Windows Server 2008
      Flexible Single Operations Masters (FSMO) running:-Infrastructure Master
       Server Roles Installed:-
      DNS
      Global Catalog (GC)

Thank you for the excellent support we are getting from all the "Experts" from Expert-Exchange

Regards,
smpvmAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Will SzymkowskiSenior Solution ArchitectCommented:
how we can convert 32-Bit windows 2008 Domain Controllers into 64-Bit windows 2012 domain controllers
32-bit and 64-bit are completely different architectures so you cannot do an in-place upgrade.

You will need to bring up completely new 2012 64-bit servers and promote them as Domain Controllers.
You will then need to move the FSMO roles over to 1 of the 2012 DC's and then demote the other 32bit DC's that you currently have.

Even if your DC's were 64bit, it is not recommended to do in-place upgrades in general, especially for domain controllers.

Will.
0
Lee W, MVPTechnology and Business Process AdvisorCommented:
I agree with Will, you cannot upgrade in place 32 to 64.  You also don't WANT to do it even 64 to 64 as upgrades cannot be as stable as clean installs, even if supported.  MIGRATE to new installs and you'll be fine.  Run DCDIAG /C /E /V on all DCs before beginning and resolve any unexplained errors.
0
smpvmAuthor Commented:
Thank Expert for the advice,Do i need to prepare my current 32-Bit windows 2008 Active Directory for both Forest Level and Domain Level by ruining adprep /forestprep and adprep /domainprep first from windows 2012 CD and by the way
can you please explain me what this command will do --> DCDIAG /C /E /V  

Regards,
0
Creating Active Directory Users from a Text File

If your organization has a need to mass-create AD user accounts, watch this video to see how its done without the need for scripting or other unnecessary complexities.

Will SzymkowskiSenior Solution ArchitectCommented:
DCDIAG is a tool to test the overall health of a domain controller at its replication partner. You want to ensure that your DC's current state is healthy before you introduce another domain controller.

Also in regards to forest prep, when you promote a 2012 DC this will automatically do the preps for you now. You do not have to manually do this on the Schema Master before promoting a New 2012 DC.

Will.
0
Lee W, MVPTechnology and Business Process AdvisorCommented:
If you don't know what DCDIAG does on your own, you probably shouldn't be the one doing the upgrade.  You're talking about a major change to your systems that run your business and DCDIAG is a common tool anyone with professional level experience with AD will know about (though not always remember to use).  If you do this yourself, at best, it sounds like it would be equivalent to a nurse performing an heart bypass operation - yes, she's a medical pro, but clearly that's not her area of expertise and if there was any possibility of getting a heart surgeon, that's what should be done.

In case you disagree with my advice:
http://blogs.technet.com/b/askds/archive/2011/03/22/what-does-dcdiag-actually-do.aspx
0
smpvmAuthor Commented:
Hello Lee W,
I am 100% agree on you but the problem is we don't have enough in house expertise and very limited budget for IT.so let me do some research and do this upgrade on a test environment and lets see who its going. by they way if you have any step-by-step guide how to upgrade a x86 windows 2008 to x64 windows 2012 domain controllers please update.I got an overall picture from Will Szymkowski post but need a good reference and checklist documentation.

Regards,
0
Will SzymkowskiSenior Solution ArchitectCommented:
step-by-step guide how to upgrade a x86 windows 2008 to x64 windows 2012 domain controllers please update.I got an overall picture from Will Szymkowski post but need a good reference and checklist documentation

I did not provide a reference link because this is pretty basic concepts with x86 and x64 architecture. They are different you cannot upgrade. This goes for any OS it does not matter. A quick google search will prove this. See link below.

http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_install/x86-to-x64/42c6ea14-0259-46d2-881d-3ca6c0143d84

Will.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Lee W, MVPTechnology and Business Process AdvisorCommented:
In theory it should work simply... the problem is when it doesn't.  If you don't understand AD and what's going on, and you try to fix it, you could destroy your network.
0
smpvmAuthor Commented:
good
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Legacy OS

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.