This Active Directory domain controller currently performs the domain naming master role. If you remove Active Directory ...

This Active Directory domain controller currently performs the domain naming master role. If you remove Active Directory Domain Services (AD DS) from this computer, you will no longer be able to add domains to or remove domains from this forest. 

Before you continue, transfer the domain naming master role to a domain controller in the root domain of the forest. If it is not possible to transfer the role, first remove AD DS from this computer, and then use Ntdsutil.exe to seize the role. Use Ntdsutil on the domain controller that you plan to seize the role to; if possible, use a recent replication partner in the same site as this domain controller. 

For more information about transferring and seizing operations master roles, see article 255504 in the Microsoft Knowledge Base (http://go.microsoft.com/fwlink/?LinkId=80395).

Do you want to continue removing AD DS from this computer?

This Active Directory domain controller appears to be the last DNS server for the following Active Directory-integrated zones: ... This Active Directory domain controller appears to be the last DNS server for the following Active Directory-integrated zones: ... This Active Directory Domain Controller cannot be promoted because of a space in the NetBIOS computer name. Rename the computer ... This Active Directory domain controller currently performs the domain naming master role. If you remove Active Directory ... This Active Directory domain controller currently performs the domain naming master role. If you remove Active Directory ... This Active Directory domain controller currently performs the infrastructure master role. If you remove Active Directory ... This Active Directory domain controller currently performs the infrastructure master role. If you remove Active Directory ... This Active Directory domain controller currently performs the primary domain controller (PDC) emulator operations master ... This Active Directory domain controller currently performs the primary domain controller (PDC) emulator operations master ...