2.1.3.4.2 PidLidSingleBodyICal
Type: PtypBoolean ([MS-OXCDATA] section 2.11.1)
The PidLidSingleBodyICal property ([MS-OXPROPS] section 2.300) is an optional property on Calendar objects that were converted from MIME messages. A value of TRUE indicates that the original MIME message contained a single MIME part.