I'm gettinga similar error on Exchange 2003 SourceOP3SVC Category: Content Engine Event ID: 1023 "Error 0x7da occurred while rendering message 0001-00003c7feac1 for download for someuser@domain.com' . I went into system manager and contect engine category is already set to none, but I'm getting these errors. I've noticed they are all in the same group ( project managers) how have a blackberry, using the BIS to pop their email to their device, and getting alerts from hosted sharepoint site. Not sure if that has anything to do with the error .. that's what I've gathered. Does anyone know what is causing this error? The technet site gives very vague answers.