2.2.2.36 PidTagSupplementaryInfo Property
Type: PtypString ([MS-OXCDATA] section 2.11.1)
The PidTagSupplementaryInfo property ([MS-OXPROPS] section 2.1036) contains supplementary information about a delivery receipt or a non-delivery report. For more details, see [MS-OXCMAIL] section 2.2.3.7.1.2.