2.4.6.2.2 Attachment Data

The actual binary content of an attachment (if any) is stored in PidTagAttachDataBinary. However, if the attachment is itself a message, the data is stored in PidTagAttachDataObject. In this case, the nid value of the PtypObject property structure defined in section 2.3.3.5 is a subnode which is a fully formed message as described in section 2.4.5 – with the exception that such attached messages are not located in the NBT and do not have a parent folder.