Article ID: 2810616 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the Exchange server creates a new admin session every time that the server tries to bind the delegate to each folder and retrieve folder properties for the delegate. Additionally, because the server sets a certain flag for each folder bind, a high-cost process flow occurs. Therefore, when BES requests the properties of many folders, the issue that is described in the "Symptoms" section occurs.
To resolve this issue, install the following update rollup:
(http://support.microsoft.com/kb/2746164/ )Description of Update Rollup 6 for Exchange Server 2010 Service Pack 2
To reduce the effect of this issue, use the following methods:
Install Exchange Server SP2 RU 6 when it becomes available.
If there are less than 15 agents on the BES, add more agents to the BES. The maximum number of agents is 15.
Reduce the number of folders in the mailbox.
If the mailbox contains many folders (for example, more than 500 folders), move the mailbox to its own instance of BESAgent.exe.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the issue, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/2726897/ )Admin sessions are exhausted as a result of delegate access in an Exchange Server 2010 environment
(http://support.microsoft.com/kb/2706690/ )Description of Update Rollup 4 for Exchange Server 2010 Service Pack 2
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
Article ID: 2810616 - Last Review: February 12, 2013 - Revision: 1.0