msdn link

The NETLOGON_DELTA_TRUSTED_DOMAINS structure contains information about a trusted domain. This structure is used for replicating the trusted domain data from the PDC to a BDC.

 typedef struct _NETLOGON_DELTA_TRUSTED_DOMAINS {
   RPC_UNICODE_STRING DomainName;
   ULONG NumControllerEntries;
   [size_is(NumControllerEntries)] 
     PRPC_UNICODE_STRING ControllerNames;
   SECURITY_INFORMATION SecurityInformation;
   ULONG SecuritySize;
   [size_is(SecuritySize)] UCHAR * SecurityDescriptor;
   RPC_UNICODE_STRING DummyString1;
   RPC_UNICODE_STRING DummyString2;
   RPC_UNICODE_STRING DummyString3;
   RPC_UNICODE_STRING DummyString4;
   ULONG TrustedPosixOffset;
   ULONG DummyLong2;
   ULONG DummyLong3;
   ULONG DummyLong4;
 } NETLOGON_DELTA_TRUSTED_DOMAINS,
  *PNETLOGON_DELTA_TRUSTED_DOMAINS;

DomainName: An RPC_UNICODE_STRING structure, as specified in [MS-DTYP] section 2.3.10, that contains the NetBIOS name of the trusted domain.

NumControllerEntries: Number of domain controller (DC) names listed in the ControllerNames field.<51>

ControllerNames: Pointer to an array of RPC_UNICODE_STRING structures, as specified in [MS-DTYP] section 2.3.10, that contain the NetBIOS names of the DCs in the trusted domain. The only restriction is the maximum value of the 32-bit unsigned integer enforced by RPC.<52>

SecurityInformation: A SECURITY_INFORMATION structure, as specified in [MS-DTYP] section 2.4.7, that specifies portions of a security descriptor about the trusted domain.

SecuritySize: Size, in bytes, of the SecurityDescriptor field.

SecurityDescriptor: Pointer to a SECURITY_DESCRIPTOR structure, as specified in [MS-DTYP] section 2.4.6 that describes the security settings for the trusted domain object.

DummyString1: A STRING structure, defined in section 2.2.1.1.2, that MUST contain 0 for the Length field, 0 for the MaximumLength field, and NULL for the Buffer field. It is ignored upon receipt. The Netlogon usage of dummy fields is described in section 1.3.8.1.2.

DummyString2: See definition for DummyString1.

DummyString3: See definition for DummyString1.

DummyString4: See definition for DummyString1.

TrustedPosixOffset: The value that contains the POSIX offset for the trusted domain, as specified in [MS-ADTS] section 6.1.6.

DummyLong2: MUST be set to zero and MUST be ignored on receipt. The Netlogon usage of dummy fields is described in section 1.3.8.1.2.

DummyLong3: See definition for DummyLong2.

DummyLong4: See definition for DummyLong2.