The DL_ID structure defines a distribution list queue identifier.

 typedef struct _DL_ID {
   GUID m_DlGuid;
   [string] wchar_t* m_pwzDomain;
 } DL_ID;

m_DlGuid: The GUID (as specified in [MS-DTYP] section 2.3.4) of the distribution list queue.

m_pwzDomain: The Active Directory domain of the distribution list queue. This field MUST be a null-terminated Unicode string.