Event ID : 8331

Issue : Users do not appear in the Global Address List.

Event Source : MSExchangeAL

Cause : On a computer that is running Microsoft Exchange Server 2003 and that has more than one logical processor, you may find that Active Directory updates from Exchange 2003 no longer work correctly. The Recipient Update Service does not configure all the Exchange attributes for the user accounts. As a result, these users may not appear in the Global Address List or may not be able to connect to their Exchange mailboxes.
When you click Check Name while configuring Exchange e-mail accounts in Microsoft Outlook, you may receive an error message that is similar to the following: The name could not be resolved. The name could not be matched to a name in the address list.

Description : The service threw an unexpected exception which was caught at Drive:\Titanium\Dsa\Src\Lra\Abv_dg\Lservagent.cpp(4511)

Action Required : To work around this problem, restart the appropriate service. For example, if the source of the event ID error message that is logged to the application event log is listed as MSExchangeAL, restart the System Attendant service.To resolve this problem, obtain the latest service pack for Exchange Server 2003.

Ref.Link : http://support.microsoft.com/kb/837444