When certain software uses MAPI to send an email via Outlook, a warning message appears. Fair enough - the likelihood that the average Windows computer is infected with spam-generating malware is pretty high. So be thankful, dear user, that the message also has an in-built delay, preventing you from closing the dialog window until Microsoft decides you're ready. It's also in your best interests that the warning appears every fucking time.
Perhaps the friendly Trust Center will let us disable the warning? Sure - but only if you're the administrator. Then perhaps the Outlook Group Policy object will let us disable the warning? The option's there - but it doesn't work.
Who can save us from this mess? Yep. You've probably got a shortcut key set up for it by now.
(12 is for Outlook 2007. Change it to 14 for Outlook 2010, 15 for Outlook 2013 etc.)
For each user, create DWORDs here with the value "2" and names as follows:
Credit to trafsta (yes, you have to register - no, don't bother).