Migration ActiveDomain Controller Windows2003 32bit to Windows2008R2

* https://social.technet.microsoft.com/wiki/contents/articles/2903.active-directory-high-level-steps-to-upgrade.aspx

1. Schema upgrade

The new object classes and attributes for the Windows Server 2003 R2 schema update are defined in a file named Sch31.ldf, which is located in the \cmpnents\R2\adprep folder on the Windows Server 2003 R2 Disc 2 (not in the \I386 folder of the Windows Server 2003 R2 Disc 1). You can view Windows Server 2003 R2 .ldf files in a text editor, but under no circumstances should their contents be modified. Modification of the .ldf files can cause irreversible changes and forest-wide failure. Use the Adprep command to make all schema updates. Do not use import tools such as LDIFDE to import the Windows Server 2003 R2 .ldf files.

* https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc755834%28v%3dws.10%29

2. Verify the schema version

dsquery * cn=schema,cn=configuration,dc=sivarajan,dc=com -scope base -attr objectVersion

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
Windows 2016            87
Windows 2019            88

3. Add new server

Install new server with a correct version of OS and join this server to the existing domain..

4. Promote server to DC

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 Jump http://technet.microsoft.com/en-us/library/hh472162#BKMK_PS Jump

• Note - If you are using Active Directory Integrated (ADI) DNS, it will get replicated as part of the Active Directory replication.

5. Transfer FSMO off decomissioned servers

If you are planning to decommission the old servers, you need to transfer FSMO roles, DHCP, etc to the new server.

Note - You can identify the FSMO role DC information using Netdom /Query FSMO command.

• References

* FSMO - http://support.microsoft.com/kb/324801 Jump * DHCP - http://support.microsoft.com/kb/962355/en-us Jump

6. Remove old dc

You can remove (demote) a domain controller using DCPROMO command and again, since WS2012 also possible with PowerShell. References

* http://technet.microsoft.com/en-us/library/cc740017(WS.10).aspx Jump * http://technet.microsoft.com/en-us/library/hh472163#BKMK_RemovePS Jump