3.4.4.2.3.1.10 ActiveDirectoryDomain/InfrastructureMaster
The InfrastructureMaster element contains the FQDN (1) of the server holding the Infrastructure FSMO role for this domain. See [MS-ADTS] section 6.1.5.
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<xs:element name="InfrastructureMaster" nillable="true" type="xs:string" />
The InfrastructureMaster element is populated from the server!dnsHostName attribute on the parent of the Infrastructure Master's nTDSDSA object. The Infrastructure Master's nTDSDSA object is the object referenced by the infrastructureUpdate!fSMORoleOwner attribute on the infrastructureUpdate object directly under the domain NC root. See [MS-ADTS] section 6.1.1.2.2.1.2.1.1 for information on the nTDSDSA object. See [MS-ADTS] sections 3.1.1.1.11 and 6.1 for information on FSMO roles and the fSMORoleOwner attribute. If the infrastructureUpdate!fSMORoleOwner or server!dnsHostName attribute is not present or cannot be read due to the client lacking access rights to read the attribute, the server returns a null ActiveDirectoryDomain/InfrastructureMaster element.