If you're new to command line switches, you can either use the Start menu, Run command (Windows key + R) or click in the Search box in the taskbar (or click on the Start menu, if you aren't showing the search field) and type the application name (outlook, in this case), a space then the switch.
(WYWO sample forms are available at Microsoft Sample Applications) How to use Command line switches 'C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE' /c ipm.note /m can create a Quick Launch or Desktop shortcut that opens a custom form, such as a While you were out phone message form, by replacing ipm.note with the published form name (i.e. The shortcut's command line accepts the email address, alias or resolvable name and looks like this: One of my favorite tricks is creating shortcuts for new messages preaddressed to specific people that I frequently send messages to.