Article ID: 2826066 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the operation that the user performed triggers a property promotion that triggers virus scanning requests for each message item. When there are many items in the virus scanning queue, all remote procedure call (RPC) connections to the Mailbox server are exhausted as new clients wait for the virus scanning operation to finish. Therefore, the Mailbox server cannot respond to any RPC requests. Then, monitoring detects that the Exchange server is unresponsive and initiates a failover.
To resolve this issue, install the following update rollup:
(http://support.microsoft.com/kb/2803727/ )Description of Update Rollup 1 for Exchange Server 2010 Service Pack 3
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about how to enable the AutoPreview feature, go to the following Microsoft website:
Display the three-line AutoPreview for email messagesFor more information about the property promotion, go to the following Microsoft website:
General information about property promotion
Article ID: 2826066 - Last Review: August 14, 2013 - Revision: 2.0