OAL Generator

Posted on 2007-11-18
Last Modified: 2013-11-30
i got these errors:
Event Type:      Error
Event Source:      MSExchangeSA
Event Category:      OAL Generator
Event ID:      9360
Date:            11/18/2007
Time:            12:13:47 PM
User:            N/A
Computer:      UPSILON
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.
- Default Offline Address List

For more information, click

For more information, see Help and Support Center at

Event Type:      Error
Event Source:      MSExchangeIS
Event Category:      General
Event ID:      9646
Date:            11/18/2007
Time:            12:07:15 PM
User:            N/A
Computer:      UPSILON
Mapi session "/o=Dmatek/ou=Dmatek ISR/cn=Recipients/cn=Raphaelk" exceeded the maximum of 32 objects of type "session".

 For more information, click

For more information, see Help and Support Center at

Event Type:      Warning
Event Source:      Server ActiveSync
Event Category:      None
Event ID:      3033
Date:            11/18/2007
Time:            9:30:03 AM
User:            DMATEK\Asher
Computer:      UPSILON
The average of the most recent [200] heartbeat intervals used by clients is less than or equal to [540].  Make sure that your firewall configuration is set to work correctly with Exchange ActiveSync and direct push technology. Specifically, make sure that your firewall is configured so that requests to Exchange ActiveSync do not expire before they have the opportunity to be processed.  For more information about how to configure firewall settings when using Exchange ActiveSync, see Microsoft Knowledge Base article 905013, "Enterprise Firewall Configuration for Exchange ActiveSync Direct Push Technology" (

For more information, see Help and Support Center at

what should i do?
why it occur?
Question by:Gil_Elul
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

Accepted Solution

c661jmb earned 500 total points
ID: 20394708
You could try checking out this KB article:


Expert Comment

ID: 20980167
I'm assuming you just migrated to 2007.

I've found this site is a lot more helpful.  There are MANY possibile reasons why you are seeing this issue.  Start here:

He's going to recommend that you get the oabinteg.exe tool.  However Microsoft doesn't have it on the site anymore.  In fact the site loops when you trying to get it.  Perhaps someone else can chime in with where the tool might be located?

Featured Post

Backup Solution for AWS

Read about how CloudBerry Backup fully integrates your backups with Amazon S3 and Amazon Glacier to provide military-grade encryption and dramatically cut storage costs on any platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Pop culture is prime bait for hackers seeking to infect user’s computers and mobile devices with malicious malware. Hackers know exactly what the latest trends are online and know how to use them to their advantage.
How to resolve IMCEAEX NDRs in Exchange or Exchange Online related to invalid X500 addresses.
The video tutorial explains the basics of the Exchange server Database Availability groups. The components of this video include: 1. Automatic Failover 2. Failover Clustering 3. Active Manager
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to:…

763 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question