Upgrading Domain Controller

10 pts.
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Active Directory
Server 2012
I have two domain controllers a primary and backup on Server 2012 running at 2003 functional level. I would like to upgrade them to 2012 R2 to enable the extra features that come with R2 what is the best and safest way of doing this? I think building a new server and making a domain controller but can you have two primary controllers?
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  • Subhendu Sen

    It is better to make the same scenario and do the task on this practice systems, not on productive systems. This way you can gain confidence and will do the job more comfortable.

    Keep in mind, always take all necessary backups/ make a clone before going to do the actual task.

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