Your network contains an Active Directory forest named contoso.com. The forest contains a member server
named Server1 that runs Windows Server 2016. All domain controllers run Windows Server 2012 R2.
Contoso.com has the following configuration.
You plan to deploy an Active Directory Federation Services (AD FS) farm on Server1 and to configure device registration.
You need to configure Active Directory to support the planned deployment.
Solution: You upgrade a domain controller to Windows Server 2016.
Does this meet the goal?

A.
Yes
B.
No
Explanation:
Device registration requires a forest functional level of Windows Server 2012 R2.
References:
https://technet.microsoft.com/en-us/windows-server-docs/identity/ad-fs/deployment/configure-a-federationserver-with-device-registration-service https://technet.microsoft.com/en-us/windows-server-docs/identity/ad-fs/design/ad-fs-requirements
I think it’s wrong. Applies to w2012R2
For Windows 2016, correct answer is A
https://docs.microsoft.com/fr-fr/windows-server/identity/ad-fs/overview/ad-fs-requirements
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An in-place upgrade of domain controller requires you to run adprep. That will upgrade the schema and therefor forfill the requirements. I go for A.
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If you are doing an in-place upgrade of an existing domain controller to the Windows Server 2016 operating system, you will need to run adprep /forestprep and adprep /domainprep manually. Adprep /forestprep needs to be run only once in the forest. Adprep /domainprep needs to be run once in each domain in which you have domain controllers that you are upgrading to Windows Server 2016.
If you are promoting a new Windows Server 2016 server you do not need to run these manually. These are integrated into the PowerShell and Server Manager experiences.
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A forest functional level of Windows Server 2012 R2 is needed. The upgrade of a DC will not accomplish that. I believe the correct answer is B.
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Sorry, wrong answer given.
Correct answer A. When upgrading a DC to 2016 adprep has to be manually performed before the upgrade can take place.
It seems the functional level needed is Windows 2008 or higher: https://docs.microsoft.com/en-us/windows-server/identity/ad-fs/overview/ad-fs-requirements
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