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Raise Domain Fucntion Level from 2003 to 2012

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Last Modified: 2018-11-01
In my previous question titled "Adding a domain controller-moving FSMO Roles-Demoting Old Domain Controller
Posted on 2018-10-29 " I completed all the steps to add the new 2012 domain controller and I moved all FSMO roles to it.  

I now have two Server 2012 domain controllers and one Server 2003 domain controller.  I'm going to demote the 2003 DC and want to raise the domain level which is now 2003.  Can I raise it from 2003 to 2012 once the 2003 DC is demoted?  


Thanks,
cja
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Director, Information Systems
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DrDave242Principal Support Engineer
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Yes. Once you've got only 2012 DCs, you can raise both functional levels to 2012, provided you don't plan to promote another DC running anything older than Windows Server 2012.

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Would I do this from Active Directory Domain and Trusts and choose "Raise Forest Function Level"?  Does that raise the domain function level or am I missing a step?  See attached.

Thanks,
cja

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forgot attachment
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Paul MacDonaldDirector, Information Systems
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"Would I do this from Active Directory Domain and Trusts and choose "Raise Forest Function Level"?"
Yes, or any of the other AD utilities.

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Are the steps to raise domain function level first then raise the forest function level?
DrDave242Principal Support Engineer
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Your screenshot shows the process of raising the forest functional level. To set the domain functional level, use AD Users and Computers. Right-click the domain and select Raise Domain Functional Level. You have to raise the domain level before raising the forest level.

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Thanks