## FolderId {#folderid}

Contains the Folder ID (FID) ([MS-OXCDATA] section 2.2.1.1) of the folder. Area: ID Properties Canonical name: PidTagFolderId Alternate names: ptagFID

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

```cpp
FolderId()
```