2.2.1.12 PidLidToDoTitle Property
Type: PtypString ([MS-OXCDATA] section 2.11.1)
The PidLidToDoTitle property ([MS-OXPROPS] section 2.346) specifies user-supplied text to identify the Message object in a consolidated to-do list. The PidLidToDoTitle property MUST NOT be set on a Task object.
To indicate an empty property, the PidLidToDoTitle property SHOULD NOT be set to the zero-length string and instead SHOULD be deleted. If this property does not exist on an object, a client SHOULD<8> set this property to the value of the PidTagNormalizedSubject property ([MS-OXCMSG] section 2.2.1.10).
On a Draft Message object, if the client implements sender flags, this property SHOULD be set to the value of the PidLidFlagRequest property (section 2.2.1.9).