sourcelink
Here are the high level steps which you can use to upgrade the
Active Directory.
Steps :
1. Upgrade the
schema using correct version of OS – Adprep
Reference -
http://technet.microsoft.com/en-us/library/dd464018(WS.10).aspx
Note - Windows Server 2008 R2 includes a 32-bit version
and a 64-bit version of Adprep.exe. The 64-bit version runs by default.
If you want to run one of the Adprep.exe commands on a 32-bit
computer, use the 32-bit version of Adprep.exe. It
is called Adprep32.exe. In Windows 2008 R2, it is located in the
\Support\Adprep folder.
You can ignore the following message. However, if you are planning to install RODC
later, you need perform ADPREP/RODCPREP
first. First Windows 2008 DC cannot be a Read Only Domain
Controller (RODC).
2. Verify the schema version
Note - You can verify the schema version using
dsquery * cn=schema,cn=configuration,dc=sivarajan,dc=com -scope base -attr objectVersion command. The following table lists the Active Directory Schema and the corresponding Object
Version:
| Active Directory |
Object Version |
| Windows 2000 |
13 |
| Windows 2003 |
30 |
| Windows 2003 R2 |
31 |
| Windows 2008 |
44 |
| Windows 2008 R2 |
47 |
| Windows 8 Beta |
52 |
| Windows 2012 |
56 |
| Windows 2012 R2 |
69 |
***ObjectVersion 39 - Please refer
http://blogs.technet.com/b/askds/archive/2011/07/15/friday-mail-sack-peevish-nediquette-edition.aspx
3. Install a new server with correct version of OS and join this server to the existing
domain.
4. Perform
DCPRMO on this server and select
Additional Domain Controller for an existing Domain option.
Beginning with Windows Server 2012, you can install
AD DS using Windows
PowerShell
the
Install-ADDSDomainController command.
Reference -
http://technet.microsoft.com/en-us/library/cc753720(WS.10).aspx
Reference PowerShell -
http://technet.microsoft.com/en-us/library/hh472162#BKMK_PS
Note - If you are using Active Directory Integrated (ADI)
DNS, it will get replicated as part of the Active Directory replication.
5. If you are planning to decommission the old servers, you need transfer
FSMO roles,
DHCP
etc to the new server.
Note - You can identify the FSMO role
DC information using
Netdom /Query FSMO command.
Reference FSMO -
http://support.microsoft.com/kb/324801
DHCP -
http://support.microsoft.com/kb/962355/en-us
6. You can remove (demote) a domain controller using
DCPROMO command and again, since WS2012 also possible with PowerShell.
Reference -
http://technet.microsoft.com/en-us/library/cc740017(WS.10).aspx
Reference PowerShell -
http://technet.microsoft.com/en-us/library/hh472163#BKMK_RemovePS