Migrate Active Directory 2008 R2 to 2012

Quick tutorial:

In this article, you are going to be introduced to the steps for migrating Active Directory from 2008R2 to 2012.

My environment is pretty small, [LAB ENV, which is empty, so this is going to be quick.

There are two machines > the first one isn’t DC 2008R2 + DNS and the second one is a new Windows Server 2012 machine

So let’s start.

First is adprep command

We have to prepare our forest so

Open on the old domain controller CMD and run

adprep /foreset

Migrate Active Directory 2008R2

And now run:

adprep/domainprep

configrem “C” letter

 

Migrate Active Directory 2008R2

Migrate Active Directory 2008R2

Please make sure yours is Functional Level Forest 2008R2

Now, we need to start with the Active Directory installation process on the new server

Notes:

Add machine to the domain.

Check and verify there is communication between machine to the new to DC01

Add manually DNS IP’s on the new server

Open Add Roles and Feature Wizard and select Active Directory Domain Services

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Migrate Active Directory 2008R2

Open task and click on “Promote this Server a Domain Controller”

Migrate Active Directory 2008R2

Migrate Active Directory 2008R2

Do not forget to allow GC+DNS

Migrate Active Directory 2008R2

Replicate from DC1.PELEGIT.COM

Migrate Active Directory 2008R2

You can change the DB, Sysvol, Logfiles details :

Migrate Active Directory 2008R2

Migrate Active Directory 2008R2

Migrate Active Directory 2008R2

 

The installation has now finished, Please perform Re-start

The next step is to start with moving FSMO steps,

On the domain controller, right-click and choose Operation Master

Migrate Active Directory 2008R2

RID master = Change > Yes

Migrate Active Directory 2008R2

PDC = Change > Yes

Migrate Active Directory 2008R2

Infrastructure = Change > Yes

Migrate Active Directory 2008R2

Go to the Active Directory Domains and Trusts

Migrate Active Directory 2008R2

Right-click on Operations Masters…

Move the –Domain Naming Master to the new server

Domain naming = Change = Yes

Migrate Active Directory 2008R2

The last role is schema,

In order to allow schema in MCC we have run this command : ( Allow DLL file ) regsvr32 .schmmgmt.dll

Migrate Active Directory 2008R2

Open MMC > Snap-Ins > Schema

Migrate Active Directory 2008R2

Change Active Directory Domain Controller…

Migrate Active Directory 2008R2

We have to change directory to other DC:

Migrate Active Directory 2008R2

Operation Master

Migrate Active Directory 2008R2

Schema Master = Change = Yes

Migrate Active Directory 2008R2

Netdom Query Fsmo

Migrate Active Directory 2008R2

Great, now the steps left are to remove old server,

Make sure you already pointed all clients to communicate with the new DC before you removing DC

The first term to remove DC is the disallow global catalog on the old server

Active Directory Sites and Services > Server DC1 > Ntds Settings > Right click Properties

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Uncheck GC > apply > ok

Migrate Active Directory 2008R2

You can run dcpromo and uninstall the server,

But there is a last option to remove domain controller is run this command.

dcpromo /forceremoval

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Migrate Active Directory 2008R2

Migrate Active Directory 2008R2

Migrate Active Directory 2008R2

Eventually, we need to restart and shutdown the server.

Please try to uninstall the server correctly.

Make sure there is no leftover of the old server under ADSI. edit

Run DCDIAG command, DNS command just to make sure what’s the status. for Video you can watch this:

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