Article ID: 972272 - View products that this article applies to.
The maximum number of public folder offline address books (OAB) that can exist in a Microsoft Exchange Server 2007 Service Pack 2 organization is limited by the architecture of public folders. Specifically, the public folder store has a limit of 32 kb for Replica IDs for the public folder hierarchy. Additionally, each OAB consumes one Replica ID, each public folder store in the Exchange Server 2007 topology consumes one Replica ID, and each Exchange admin group consumes one Replica ID.
In a hosting environment, such as Microsoft Hosted Messaging and Collaboration, each hosted tenant is typically configured to use a tenant-specific OAB if MAPI clients are used. This limits the total size of Replica IDs for hosted tenants in a single Exchange organization to less than 32 kb.
Exchange Server 2007 Service Pack 2 introduces a method to distribute OABs. This method uses HTTP downloads from a user-defined location on an Exchange Server 2007 server that has the Client Access Server (CAS) role installed. This OAB download method is available for Microsoft Office Outlook 2007. The Web download location is provided to a client by using an AutoDiscover Web service request when the client is started.
To resolve this issue, install Update Rollup 1 for Exchange 2007 Service Pack 2, and then enable the new method that is described in the "Introduction" section. To do this, follow these steps:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 972272 - Last Review: November 19, 2009 - Revision: 1.1