2.2.2.2.32 PidLidTaskGlobalId Property

Type: PtypBinary ([MS-OXCDATA] section 2.11.1)

The PidLidTaskGlobalId property ([MS-OXPROPS] section 2.319) specifies a unique GUID for this task, used to locate an existing task upon receipt of a task response or task update. This property MUST be set for assigned tasks, but it can be left unset for unassigned tasks.