2.2.1.35 PidLidIsException Property
Type: PtypBoolean ([MS-OXCDATA] section 2.11.1)
A value of TRUE for the PidLidIsException property ([MS-OXPROPS] section 2.155) indicates that the object represents an exception (including an orphan instance). A value of FALSE indicates that the object represents a recurring series or a single-instance object. The absence of this property for any object indicates a value of FALSE except for the Exception Embedded Message object, which assumes a value of TRUE.