Microsoft KB Archive/313113

= XADM: Rules to Create Multiple Public Stores in Exchange 2000 =

PSS ID Number: 313113

Article Last Modified on 2/9/2004

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The information in this article applies to:


 * Microsoft Exchange 2000 Server

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This article was previously published under Q313113



SUMMARY
This article describes the rules that you must follow when you create multiple public folder stores and multiple public folder hierarchies. This article also describes the relationship of public folder hierarchies to public folder stores in Exchange 2000.



Terminology
A public folder hierarchy is also known as a public folder tree and as a top-level hierarchy (TLH).

The MAPI public folder tree is also known as the MAPI TLH.

A non-MAPI TLH is also known as an application TLH or a general purpose TLH.

Rules for Creating Public Stores and Hierarchies
This section lists the rules that you must follow to create multiple public stores and multiple public hierarchies in Exchange 2000:  You can only have one public folder hierarchy per public store. An Exchange 2000 Standard server can only have one public folder store. An Exchange 2000 Enterprise server can have up to 19 public folder stores. This includes up to 4 mailbox stores and 1 public folder store for the first storage group and up to 5 mailbox stores for the remaining 3 storage groups. A server cannot have multiple public folder stores that contain the same public folder hierarchy. You can only create a new public folder store if a public folder hierarchy exists that is not currently assigned to a public folder store on the server. If no public folder hierarchy exists that is not currently assigned to a public folder store on the server:  Right-click the Folders container to create a new public folder tree.</li> Create a new public folder store on the server and assign the new public folder tree to the new public folder store.</li></ol> </li> There can only be one MAPI public folder hierarchy in the Exchange 2000 organization.</li></ol>

Public Folder Hierarchy Types
In Exchange 2000, there are two types of public folder hierarchies. One is the MAPI public folder hierarchy, which is the only MAPI public folder hierarchy in Exchange Server 4.0 - 5.5 and which also exists in Exchange 2000. The other type of public folder hierarchy is the application public folder hierarchy, which exists only in Exchange 2000 and does not exist in earlier versions of Exchange Server.

A TLH is the root of a public folder tree. In Exchange Server there was only one TLH, which was named &quot;Public Folders.&quot; In Exchange 2000 there can be several TLHs. The &quot;Public Folder&quot; TLH is one of many public folder trees. The &quot;Public Folder&quot; TLH is typically known as the MAPI TLH, and it performs the same tasks in Exchange 2000 that it performed in Exchange Server (and will replicate with the Exchange Server Public Folder tree). However, in Exchange 2000, there can also be multiple additional trees, typically known as Application TLHs (App TLH).

When you install Exchange 2000, a default public folder tree is created that is accessible from all MAPI (Outlook) clients and Internet protocol clients such as HTTP, Internet Message Access Protocol, Version 4rev1 (IMAP4), and Network News Transfer Protocol (NNTP). Later (non-MAPI) public folder trees are only accessible from HTTP and NNTP clients. Post Office Protocol version 3 (POP3) clients cannot access either MAPI public folder trees or non-MAPI public folder trees.

Additional Information
For additional information about the MAPI public folder tree, click the article numbers below to view the articles in the Microsoft Knowledge Base:

246743 XADM: The Public Folder Tree

241689 XADM: Only the Default &quot;All Public Folders&quot; Public Folder Tree Is Available for MAPI Clients

For additional information about non-MAPI public folder trees, click the article number below to view the article in the Microsoft Knowledge Base:

272183 XCCC: How to Connect to a Non-MAPI TLH in Outlook Web Access

For additional information about public folder hierarchies in Exchange 2000, click the article number below to view the article in the Microsoft Knowledge Base:

258509 XADM: Public Folder Tree Types in Exchange 2000 Server

For additional information about creating new public folder hierarchies, click the article number below to view the article in the Microsoft Knowledge Base:

255077 HOW TO: Create a New Public Folder Tree and Store in Exchange 2000 Server

By default, the Folders container in which new public folder trees are created only exists in the default first administrative group. For additional information about how to add a Folders container to a second administrative group so that a new public folder tree can be added to a server in a new administrative group, click the article number below to view the article in the Microsoft Knowledge Base:

270869 XADM: You Must Create an Additional Folders Container to Create an Additional Public Folders Tree

Keywords: kbinfo KB313113

Technology: kbExchange2000Search kbExchange2000Serv kbExchange2000ServSearch kbExchangeSearch

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