3.1.4.1 Obtaining a Hierarchy of Address Book Containers
When using an address book server, messaging clients obtain the address book hierarchy table by using either the NspiGetSpecialTable method, as specified in [MS-NSPI] and [MS-OXNSPI] section 3.1.4.1.3, or the GetSpecialTable request type, as specified in [MS-OXCMAPIHTTP] section 2.2.5.8.<55><56> The hierarchy table is a set of rows, each of which describes one address book container.
The hierarchy table in an OAB MAY<57> be obtained by using the OAB Public Folder Retrieval Protocol, as specified in [MS-OXPFOAB].