MS07-026: Vulnerabilities in Microsoft Exchange Could Allow Remote Code Execution (931832)

I think I have answered my own query.  I had a front end server that never had 916783 and the 931832 hotfix definitely does change the behaviour for disabled accounts.  This is a real pain for us as we have a custom developed Identity management system that automatically disables accounts.  Now we have to develop a new process to stop email delivery.  It is annoying that this embedded functionality change in the security hotfix wasn't better advertised jsut like the "Send As" change was alerted to.