The DefaultPartition element contains the distinguished name of the domain naming context of the directory service.

 <xs:element name="DefaultPartition" nillable="true" type="xs:string" />

The DefaultPartition element is populated from the nTDSDSA!msDS-hasDomainNCs attribute on the nTDSDSA object specified by the GetADDomainControllerRequest/NtdsSettingsDN (section input parameter element. If the nTDSDSA!msDS-hasDomainNCs attribute is not present or cannot be read due to the client lacking access rights to read the attribute, the server returns a null ActiveDirectoryDirectoryServer/DefaultPartition element.