Hello, I'm getting event ID 9341 and 9360 OALGen encountered an error while generating the changes.oab file for version 2 and 3 differential downloads of address list '\Global Address List'. The offline address list has not been updated so clients will not be able to download the current set of changes. Check other logged events to find the cause of this error. If the cause of the problem was intentional or cannot be resolved, OALGen can be forced to post a full offline address list by creating the DWORD registry key 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters\OAL post full if diff fails' and setting it to 1 on this server. When OALGen next generates the offline address list, clients will perform a full OAB download. After that time, the registry key should be removed to prevent further full downloads. Event ID :9109 Event Type: Warning Event Source: MSExchangeSA Event Category: OAL Generator Event ID: 9109 Date: 5/24/2010 Time: 11:41:27 AM User: N/A Computer: HDEX1B Description: OALGen encountered an error 80040307 (internal ID 50202b6) while generating address list '\Global Address List'. Check other logged events to see if this is a serious error. - Default Offline Address List I get these errors usually when I try to rebuild the offline address book Exchange server 2003 SP2 I appreciate any help...! Thanks Rao

Did you follow the instructions in the event log entry? -- Ed Crowley MVP "There are seldom good technological solutions to behavioral problems." . "Rao G" wrote in message news:985673a6-fa9c-46e5-a335-24f945d3d677... Hello, I'm getting event ID 9341 and 9360 OALGen encountered an error while generating the changes.oab file for version 2 and 3 differential downloads of address list '\Global Address List'. The offline address list has not been updated so clients will not be able to download the current set of changes. Check other logged events to find the cause of this error. If the cause of the problem was intentional or cannot be resolved, OALGen can be forced to post a full offline address list by creating the DWORD registry key 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters\OAL post full if diff fails' and setting it to 1 on this server. When OALGen next generates the offline address list, clients will perform a full OAB download. After that time, the registry key should be removed to prevent further full downloads. Event ID :9109 Event Type: Warning Event Source: MSExchangeSA Event Category: OAL Generator Event ID: 9109 Date: 5/24/2010 Time: 11:41:27 AM User: N/A Computer: HDEX1B Description: OALGen encountered an error 80040307 (internal ID 50202b6) while generating address list '\Global Address List'. Check other logged events to see if this is a serious error. - Default Offline Address List I get these errors usually when I try to rebuild the offline address book Exchange server 2003 SP2 I appreciate any help...! Thanks Rao Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Troubleshooting steps: 1. Please go to ESM 2. Check the properties of the OAB version X public folder (where X is 2, 3a, or 4) that you are planning to remove and rebuild. Check the “Replication” page and note what servers hold a replica of this folder instance 3. Delete instances of OAB version 2 from the “Folders” -> “Public Folders” list 4. Next, on the OAL Gen server’s Public Folder store, Right Click folder -> Send Hierarchy to force the replication of this deletion 5. Confirm that the deletion has taken place on any remaining servers that previously held a replica 6. Perform a Rebuild on the Default Offline Address List 7. Check the Application Log until you see Event 9107 (Offline address list generation finished). 8. Check the "First Admin Group\Folders\Public Folders" instances for a new single instance of the OAB version X that was deleted earlier in these steps. The folder should now exist and should also contain new content reflecting the current date. 9. Repeat the step 2-8 for any remaining OAB version X folders that are not updating properly 10. Finally, check the clients that had exhibited the out of date OAB. They should now show updated and current data in their OAB’s. If not, restart that client on the workstation Resources: How to troubleshoot the OAB Generation process Error message when a user performs the Send/Receive operation in Outlook:"Unknown error 0x8004011B"James Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com