## ValidFlagStringProof {#validflagstringproof}

Contains the value of the PidTagMessageDeliveryTime property (section 2.780) when modifying the PidLidFlagRequest property (section 2.136). Area: Tasks Canonical name: PidLidValidFlagStringProof Alternate names: dispidValidFlagStringProof

**Returns:** System::SharedPtr < PidLidPropertyDescriptor > Aspose::Email::Mapi::

```cpp
ValidFlagStringProof()
```