Hey guys, We're having this strange issue with the Exchange 2003 MTA Stacks everytime we boot the server up. I also believe that we have period issues that occur throughout the day, but I need to confirm that. For some reason or another, when the server boots the MTA Stack is set to start automatically but doesn't. When going through the event log, we see the following error message: Also just to mention, there is nothing listed on eventid.net per comments on the page that really helps. There is a message in the application log about: Event source: MSExchangeMTA Event category: Field Engineering Event ID: 9409 Date: date Time: time Type: Information User: N/A Computer: ComputerName Description: The Microsoft MTA registry parameter Max RPC Alloc Size is missing. The default value will be used. (BASE MAIN BASE 1) (14) But MS also claims this is a benign error.