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Event ID 623 occurs when you deploy Outlook 2010 in an Exchange 2003 environment
Article ID: 2721098 - View products that this article applies to.
The Information Store service stops responding when you deploy Microsoft Outlook 2010 in a Microsoft Exchange Server 2003 environment.
When this issue occurs, an error message that resembles the following is logged in the Application log on the server that is running Exchange Server 2003:
Event Type: Error
Event Source: ESE Event
Category: Transaction Manager
Event ID: 623
Description: process_name (PID) The version store for instance instance ("name") has reached its maximum size of value Mb. It is likely that a long-running transaction is preventing cleanup of the version store and causing it to build up in size. Updates will be rejected until the long-running transaction has been completely committed or rolled back. Possible long-running transaction: SessionId: value Session-context: value Session-context ThreadId: value.
This issue occurs because of changes to the nickname cache in Outlook 2010.
To resolve this issue, use one of the following methods, as appropriate for your situation.
Note Only follow these steps on client computers that are running Outlook 2010. Earlier versions of Microsoft Outlook do not store the nickname cache on the server.
Method 1: Decrease the number of allowed nicknames
Note We recommend that you use this method to resolve the issue that is described in the "Symptoms" section.
To resolve this issue, decrease the maximum number of nicknames that can be stored in the nickname cache. To do this, follow these steps:
To resolve this issue, change how frequently Outlook 2010 clients synchronize nickname cache changes to the server that is running Exchange Server 2003. To do this, follow these steps:
To resolve this issue, you can disable the nickname cache feature by editing the registry or by changing the option in the Outlook user interface.
To disable the nickname cache featureby setting a registry value, follow these steps:
In Outlook 2010, a temporary copy of the nickname cache is stored in memory on the local computer. A permanent copy of the nickname cache is stored in the Associated Contents table of the Inbox. The nickname cache is stored in an IPM.Configuration.Autocomplete message class and subject. By default, the nickname cache is synchronized to the server every 10 minutes if changes are made to the local copy. For example, the nickname cache is synchronized if items are added to or deleted from the local copy of the nickname cache.
Typically, a mailbox stores approximately 1,000 nicknames. Therefore, an IPM.Configuration.Autocomplete message that is synchronized to the servers is between one megabyte (MB) and 1.5 MB. However, if many clients try to synchronize the nickname cache at 10 minute intervals, the issue that is described in the "Symptoms" section can occur.
For more information about the nickname cache in Outlook 2010, visit the following Internet website:
http://www.msexchangegeek.com/2012/01/07/outlook-2010-nickname-cache-an-insider-story/For more information about the nickname cache in Outlook 2007 and Outlook 2010, visit the following MSDN website:
http://msdn.microsoft.com/en-us/library/ff625288.aspxFor information about how to troubleshoot version store issues related to JET_errVersionStoreOutOfMemory errors, visit the following TechNet website: