184.108.40.206 Opening a Folder
Before any data can be read from or written to a folder, the client opens the folder. The client MUST have sufficient access rights to the folder for this operation to succeed.
To open an existing folder, the client sends the RopOpenFolderROP request ([MS-OXCROPS] section 220.127.116.11). To send this request, the client first obtains the FID ([MS-OXCDATA] section 18.104.22.168) for the Folder object to be opened. The FID can be retrieved from the hierarchy table that contains the folder's information by including the PidTagFolderId property (section 22.214.171.124.1.5) in a RopSetColumns request ([MS-OXCROPS] section 126.96.36.199.1).
The Folder object that is opened can be used in subsequent operations. When the client completes operations on the Folder object, the client MUST release the object as specified in section 188.8.131.52.