These are some of the useful outlook web access shortcut keys
Del – Delete a message
Enter – Open any outlook item (Message, Appointments, Notes etc.)
Ctrl+N – Create a new outlook item (Message, Appointments, Notes etc.)
Ctrl+R – ‘Reply to’ a message
Ctrl+Shift+R – ‘Reply to all’ message
Ctrl+Shift+F – Forward a message
Alt+S – Send mail
Esc – Close a window
Ctrl+K – Resolve recipient name using address book
F7 – Spell Check
Ctrl+Q – Mark the message as read
Ctrl+U – Mark the message as unread
Ctrl+r – To Refresh