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

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

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
Not sure what the best email signature size is? Are you worried about email signature image size? Follow this best practice guide.
In this video we show how to create a mailbox database in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Servers >> Data…
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…

758 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

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now