Article ID: 969948 - View products that this article applies to.
Consider the following scenario:
This problem is caused by a lack of performance when the Microsoft Exchange IMAP4 service process too many items.
To resolve this problem, install the following update rollup:
972076After you apply this update, you can add a key named MaxFolderItemCount in the Microsoft.Exchange.Imap4.exe.config file. After an Exchange administrator apply this update, the Exchange administrator can add a key namedMaxFolderItemCount in the Microsoft.Exchange.Imap4.exe.config file to set the expected maximum number. After that, if a user tries to open a folder whose item count exceeds the maximum item count that the Exchange administrator have set in the MaxFolderItemCount key, the Exchange Administrator will receive the following 2103 warning message to find out whose mailbox cause the problem:
(https://support.microsoft.com/kb/972076/ )Description of Update Rollup 2 for Exchange Server 2007 Service Pack 2
sample of Microsoft.Exchange.Imap4.exe.config is as following:
Note You have to restart the Microsoft Exchange IMAP4 service for the change to take effect. Use of the MaxFolderItemCount does not prevent IMAP users from accessing folders that exceed the MaxFolderItemCount value.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 969948 - Last Review: October 9, 2011 - Revision: 4.0