At work I'm using Outlook 2011 and OSX 10.10. I just sent yet another incomplete email accidentally with the shortcut CMD + right enter. Is there any way to disable this shortcut? Googling around shows adding keyboard shortcuts into OSX itself but not Outlook. Thanks!
You can't disable it, but you can re-map the shortcut so you're far less likely to hit it.
Open System Preferences, go to Keyboard > Shortcuts (tab)> App Shortcuts (Left field). Click the "+", select "Microsoft Outlook" from the "Application:" list, change "Menu Title:" to "Send," and change the shortcut to something you aren't likely to hit accidentally, such as Shift + CMD + Option + G," or similar.
Close and re-open Outlook. Enjoy not accidentally sending unfinished eMail!