The OAB generation is unsuccessful and Event IDs 9328 and 9373 are logged in the Application log in a Windows Server 2008-based Exchange 2007 Single-Copy cluster environment

In a Windows Server 2008-based Exchange 2007 Single-Copy cluster environment, when you try to generate the Offline Address Book (OAB), the operation fails. Additionally, the following event errors are logged in the Application log:

Log Name: Application
Source: MSExchangeSA
Event ID: 9328
Task Category: OAL Generator
Level: Error
Keywords: Classic
Description:
OALGen encountered file error 80070043 (internal ID 505021e) while generating the offline address list for address list '\Global Address List'. Make sure there is enough disk space available.
- Default Offline Address Book

Log Name: Application
Source: MSExchangeSA
Event ID: 9373
Task Category: OAL Generator
Level: Error
Keywords: Classic
Description:
OALGen detected that the file '\\<server name>\ExchangeOAB\xxxx' is corrupted or missing. This indicates data tampering or disk problems. Restore files in this folder from the recent backup or clean up folder content and force a full OAB generation.
- Default Offline Address Book

To resolve this problem, download and install Update Rollup 5 for Exchange 2007 Service Pack 1. For more information about Update Rollup 5 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic: For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:
IMPORTANT To enable the change in this hotfix, you must apply the hotfix that is described in Microsoft Knowledge Base article 955733. For more information, click the following article number to view the article in the Microsoft Knowledge Base: