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Offline OAB not working Exchange 2003

Posted on 2008-10-07
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I have an Exchange 2003 Enterprise server, I'm migrating to Exchange 2007, I installed a new server with Exchange 2007, most of the clients use Outlook 2003, all my mailboxes still are in the 2003 version.

I create several new users in Exchange 2003 and some test users in Exchange 2007, but no one appears in the Offline Address Book in the clients, I have made some test an configurations but no one works, I'll list every thing below:

Download address book in outlook, it doesn't work
Press F9 in outlook, itdoesn't work
I disabled the offline folders, it works but I couldn't use the distribution address book offline
I rebuilted the default offline address book, it doesn't work
I reviewed the configuration for a valid address book but every thing seems to be ok

Something weird I found is that I cannot see any new user in the Global Address List, but I see new users in the All Users Address List, unfortunately when I try to verify a user in the Outlook send mail window the verify process uses the Global Address List.

Any idea?
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Question by:portiz60
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by:gupnit
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Well I reviewed all the options mentioned in the article, I rebuilded the OAB, I ensured that my outlook is configured to download the full address book, but nothing works, every thing was working great before I added the Exchange 2007 server.

I found this error in the Exchange 2003 Event viewer:

Event ID 9360
Event ID: 9360
Category: OAL Generator
Source: MSExchangeSA
Type: Error
Machine: SERVER_NAME
Message: 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.

I followed the directions in the text and now every thing is working.
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