Hi all, i have a scenario where I auto reply to an external source for testing purposes. The external source adds a custom X header, The autofoward rule on the mailbox works fine but it seems on the email hits the hub transport store driver it removes the custom X header. Can this be changed? http://technet.microsoft.com/en-us/library/bb232136.aspx I have been through this article and proved the store driver on the Hub transport is the issue. Thanks Mad