You indicated that this Active Directory domain controller is the last domain controller for the domain "%1", but Active ...

You indicated that this Active Directory domain controller is the last domain controller for the domain "%1", but Active Directory Domain Services detected that other domain controllers may exist.  If you are certain that this is the last domain controller for the domain and want to proceed, set the 'IgnoreIsLastDCInDomainMismatch' option to 'YES'.