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108Microsoft Exchange 2000 Operations Guide — Version 1.0
Public folder tree (also known as public folder root and top level hierarchy – TLH)
A collection of public folders created under the same hierarchical namespace. Previous releases of Exchange server used only a single tree (called: All Public Folders), whereas multiple trees can be defined in Exchange 2000. Each tree is a unit of hierarchy replication and can be replicated to one or more Public MDBs. A Public MDB can host only one tree. Messaging Application Programming Interface (MAPI) clients such as Outlook can only access a single tree called All Public Folders, whereas other clients such as a Web browser or a networking client using the Microsoft Web Storage System can access any tree that is defined.
RC2
a variable
Because of the variable key size it can be made more secure or less secure than DES against exhaustive key search. The algorithm is confidential and proprietary to RSA Data Security.
RC4
Avariable
Recipient Update Service – RUS
This is part of the Exchange System Attendant and is responsible for keeping Address Lists
Remote Procedure Calls – RPC
A reliable synchronous protocol that transfers data between clients and servers, and between servers. Outlook clients use Messaging Application Programming Interface (MAPI) RPC for accessing mailboxes and public folders, and servers running Exchange 2000 communicate with the Exchange Server 5.x Message Transfer Agent (MTA) using RPC (in a
Resource
In
Resource mailbox
A mailbox that is associated with a resource instead of a user (such as a conference room for reservation purposes). In Exchange 5.5 one user (Windows security principal) may have had several mailbox accounts associated with it – such as a receptionist with a personal mailbox and a conference room mailbox associated. In Exchange 2000, there must be a