Consider the following scenario:
- Some Microsoft Outlook clients connect to a Client Access server array by using a hardware load balancer in a Microsoft Exchange Server 2010 environment.
- One of the Mailbox servers freezes.
This issue occurs because the limit for the number of pending threads in the RPCClientAccess.exe process is not low enough. Therefore, it takes a long time to call back threads from the Mailbox server that freezes.
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 RPC Client Access service, go to the following Microsoft website: