Promote backup Domain controller to primary

We have a Server 2008 server and just purchased and setup a 2016 server.  The 2008 machine is our Domain Controller.  We setup the 2016 server as the backup domain controller and transferred DNS over and have DHCP backed up and ready to install on the 2016 machine.

I was told I have to decomission the old server by removing it from the domain per these instructions:

https://technet.microsoft.com/en-ca/library/cc771844(v=ws.10).aspx

After I do this, is there anything specific I need to do to the new server for it to take over?  Will it automatically take over or is there somewhere I have to "make it primary controller".

Just feel like I'm missing something and we're trying to do this asap.
joeshinallAsked:
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Olgierd UngehojerSenior Network AdministratorCommented:
You have to transfer FSMO roles to another Active Directory Controller first.
This article will you explain the steps https://www.interworks.com/blog/ijahanshahi/2014/01/20/transferring-fsmo-roles-another-active-directory-controller

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joeshinallAuthor Commented:
Thank you Olgierd!  That's exactly what I was missing and I couldn't remember what it was.  I did that and now ready to demote the old server.  Thanks so much for your help once again!
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Windows Server 2016

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