I'm using ExMerge.exe to export some old mailboxes to PST format for archiving. I've followed instructions at http://technet.microsoft.com/en-us/library/bb124178%28EXCHG.65%29.aspx and http://technet.microsoft.com/en-us/library/aa996410%28EXCHG.65%29.aspx
To make sure I have permissions appropriately setup.
However I get the message
[13:50:02] Error opening message store (MSEMS). Verify that the Microsoft Exchange Information Store service is running and that you have the correct permissions to log on. (0x8004011d)