Outlook has unique keyboard shortcuts so you don’t have to waste time moving your mouse around or searching through menus. Below is a list of the most popular keyboard shortcuts for the tasks that are used most frequently.
Ctrl+R: reply to email
Alt+R: reply to all in email or switch to the work week calendar view
Alt+W: forward email or switch to the weekly calendar view
Ctrl+M: F9 to Send/Receive all
Alt+S: Send email
Ctrl+G: open the “Go to date” dialog to jump to any date in the calendar