126.96.36.199.2 Reading SearchFolderID
The server MUST read the value of the SearchFolderID subproperty from every search folder, as specified in [MS-OXOSRCH] section 2.2.4, in the Finder special folder. Any search folder that has this subproperty is a persistent search folder, and the server SHOULD display the search folder as such in the UI. Searches with the Finder special folder are further specified in [MS-OXOSRCH] section 188.8.131.52.2. For more details about the Finder special folder, see [MS-OXOSFLD].