OALGen encountered an error while generating version 2 and 3 of OAB
Topic Last Modified: 2007-11-16
The Microsoft Exchange Server 2007 Management Pack for Operations Manager monitors the Windows Application log on computers that are running Exchange Server 2007 and generates this alert when the event or events specified in the following Details table are logged.
To learn more about this alert, if you are using Microsoft Operations Manager 2005, do one or more of the following:
From the Operator Console, select this alert, and then click the Properties tab. Review the description of the alert that includes the variables specific to your environment.
From the Operator Console, click the Events tab, and then double-click the event in the list for which you want to review the event description. Review the events that have been logged that meet the criteria of this Operations Manager alert.
To learn more about this alert, if you are using System Center Operations Manager 2007, do one or more of the following:
From the Operations Console, double-click this alert, and then click the General tab. Review the description of the alert that includes the variables specific to your environment.
From the Operations Console, double-click this alert, and then click the Alert Context tab. Review the events that have been logged that meet the criteria of this Operations Manager alert.
Details
Product Name |
Exchange |
Product Version |
8.0 (Exchange Server 2007) |
Event ID |
9360 |
Event Source |
MSExchangeSA |
Alert Type |
Critical Error |
MOM Rule Path |
Microsoft Exchange Server/Exchange 2007/Mailbox/System Attendant |
MOM Rule Name |
OALGen encountered an error while generating version 2 and 3 of OAB. Not all verisions of this OAB will be published. |
Explanation
For Microsoft Outlook clients that are running Office Outlook 2003 Service Pack 1 (SP1) or earlier, if a Microsoft Exchange server that is running Exchange Server 2003 Service Pack 2 (SP2) determines that a differences download is more efficient, and if a differences file cannot be generated on a server that is running Exchange 2003 SP2, Exchange Server will not automatically force a full offline address book (OAB) download. Instead, Exchange logs MSExchangeSA event 9360. MSExchangeSA event 9360 indicates that it was unable to produce a differences file and will not produce a full OAB file.
Note
When this event is logged, the users running Outlook 2003 SP1 or earlier will not be able to receive OAB updates until the problem is corrected.
The offline address list has not been updated, so clients will not be able to download the current set of changes.
User Action
To resolve this error, do one of the following:
In Event Viewer, examine the Application log for events that occur before and after MSExchangeSA event 9360. These related events may help you discover the reason that Exchange cannot generate a differences file for your Outlook clients that are running Outlook 2003 SP1 or earlier.
Generate a full OAB download file when a differences file cannot be generated:
Warning
Incorrectly editing the registry can cause serious problems that may require you to reinstall your operating system. Problems resulting from editing the registry incorrectly may not be able to be resolved. Before editing the registry, back up any valuable data.
Perform the following procedure to edit the registry.
On the Exchange server, start Regedit.exe.
Open the following registry key:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeSA\Parameters
Right-click Parameters, point to New, and then click DWORD Value.
For the new value name, type OAL post full if diff fails.
Double-click OAL post full if diff fails. In Value data, type 1. Click OK.
Close Regedit.exe.
Before you edit the registry, and for information about how to edit the registry, see Microsoft Knowledge Base article 256986, Description of the Microsoft Windows Registry.
For More Information
To search the Microsoft Knowledge Base articles based on criteria that generated this alert, visit the Search the Support Knowledge Base (KB) Web site.
To review Exchange 2007 event message articles that may not be represented by Exchange 2007 alerts, see the Events and Errors Message Center.
If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.