On a server that is running Microsoft Exchange 2007, the Store.exe process hangs intermittently. Therefore, all clients that are trying to access the server are blocked. Additionally, the administrator must restart the Microsoft Exchange Information Service.
Note If the environment you are using is a cluster environment, a failover is performed to recover the service.
This problem occurs because of a code defect. This code defect causes a deadlock in the Store.exe process.
To resolve this problem, install the following update rollup:
971534 Description of Update Rollup 1 for Exchange Server 2007 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.