My OAB is missing some newly created users. In Event Viewer i am seeing below mentioned log,

Event id : 9334

OABGen encountered error 80040920 while initializing the offline address book generation  process.

Anyone came across such a problem. Thanks in Advance.

Regards,

Kris

• Moved by Jason Johnston [MSFT]Microsoft employee Wednesday, May 13, 2015 5:49 PM Not a development question.

HI,

I have noticed only some newly created users had the issues. Whats your exchange version?

You could restart the Microsoft Exchange System Attendant service to have a try.

If the issue persists, your server is exchange 2013,please check if the OAB file can be generated in  %ExchangeInstallPath%\ClientAccess\OAB\ folder.

If its prior to exchange 2013 ,please check the OAB file in %ExchangeInstallPath%\ExchangeOAB folder.

On your server side, please run the following command to add a new OAB :

Set-OfflineAddressBook -Identity "My OAB" -IsDefault $true

if it doesn't work,please check your autodiscover service:

Get-ClientAccessServer | FL Identity,AutodiscoverServiceInternalUri

On the problematic client side, please run Test E-mail AutoConfiguration Tool to check if the client can get the OAB URL,and collect the Logs tab and Results tab information.

Also you can recreate a new Outlook profile to test on the problematic clients.

Best Regards,

David