An Exchange Information store worker process (Microsoft.Exchange.Store.Worker.exe) crashes when you try to export some mailboxes in a Microsoft Exchange Server 2013 environment. Additionally, the following messages are logged in the Application log:
To resolve this issue, install the following cumulative update:
2859928 Description of Cumulative Update 2 for Exchange Server 2013
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.