Your network contains an Active Directory forest. The forest contains two domains named litwareinc.com and contoso.com. The contoso.com domain contains two domain controllers named LON-DC01 and LON- DC02. The domain controllers are located in a site named London that is associated to a subnet of 192.168.10.0/24.
You discover that LON-DC02 is not a global catalog server.
You need to configure LON-DC02 as a global catalog server.
What should you do?
A. From the properties of the LON-DC02 computer account in Active Directory Users and Computers, modify the NTDS settings.
B. From Active Directory Sites and Services, modify the properties of the 192.168.10.0/24 IP subnet.
C. From Windows PowerShell, run the Set-NetNatGlobal cmdlet.
D. From Windows PowerShell, run the Enable-ADOptionalFeature cmdlet.
Just checked on an actual DC and A is correct.
Checkbox under NTDS settings.
None of these answers are correct, it has be done from AD Sites & Services, not ADUC, and the powershell command is
Set-ADObject, otherwise you can use the command line command Repadmin
https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/manage/ad-forest-recovery-add-gc
It’s working form both location ADUC and NTDS Settings form DC in AD Sites and Serviceses