Replace 2003 domain controller with 2012

We have 4 domain controllers.   3 windows server 2008 r2 and one windows server 2003. I was asked to look into what the steps would be to replace the 2003 server with a 2012 server. I believe I was asked to get the information as a chance to learn.  What steps should I take in order to replace the 2003 with the 2012?
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Peter HutchisonConnect With a Mentor Senior Network Systems SpecialistCommented:
1. Install Windows 2012 server OS
2. Apply schema updates to schema and domain
3. Installed ADDS role and promote it to a DC via Server Manager
4. Make sure all objects copied and Sysvol is replication across fully (12-24 hrs)
5. Move any FSMO roles from 2003 server to other servers using the AD MMCs.
6. Run dcdiag and repadmin to check all DC servers
7. On 2003 server demote the server using dcpromo.exe command
RoccatAuthor Commented:
Thank you!
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