When a Default Gathering is run against an Organization that has Exchange 2003 Front-End Servers, the Exchange Mailboxes task will fail for those servers.
This occurs because there are no mailboxes hosted on Exchange 2003 Front-End Servers. Exchange 2003 does not have specific role definitions for the different server roles. Since Exchange 2003 does not have server roles, it is not possible to determine what type of function the server provides so MessageStats runs all the tasks of the Default gathering against every Exchange 2003 server.
None. MessageStats is running properly and the task failure can be ignored
