Hi there we use EMC Networker to backup up our Exchange cluster - Exchange 2003 SP2. The Public Folders backup has never (though some of the public folders have backed up) worked due to a COM error 0x80070005 - access is denied. We know that the permissions are set correctly and that Networker is configured correctly.I think the backup failure may be due to corruptions within the folders. Are there any Exchange utilities available that can scan and identify and even remove. any corruptions