Outlook 2010 supports a number of command-line switches that modify the way the program starts and functions. Although you can issue the Outlook.exe command with switches
from a command prompt, it’s generally more useful to specify switches through a shortcut,
particularly if you want to use the same set of switches more than once

some of the startup switches that you can use to modify the way Outlook 2010 starts and
functions.


Modifying a shortcut to add command-line switches

 

Copy the shortcut of outlook in c:\program files\microsoft office\office14 to desktop

Outlook Startup Switches_outlook

 

right click the shortcut on desktop and add switch to target item.

Outlook Startup Switches_outlook_02 
/a <filename>                         Opens a message form with the p_w_upload specified by <filename>
/c ipm.activity                         Opens the journal entry form by itself
/c ipm.appointment                Opens the appointment form by itself
/c ipm.contact                         Opens the contact form by itself
/c ipm.note                             Opens the message form by itself
/c ipm.stickynote                     Opens the note form by itself
/c ipm.task                              Opens the task form by itself
/c <class>                               Creates an item using the message class specified by <class>
/CheckClient                          Performs a check to see whether Outlook 2010 is the default    application for email, calendar, and contacts


/CleanFreeBusy                       Regenerates free/busy schedule data
/CleanReminders                     Regenerates reminders
/Safe Starts                             Outlook without the Reading pane or toolbar customizations
and with native and COM add-ins disabled
/safe:1                                      Starts Outlook with the Reading pane off
/safe:3                                       Starts Outlook with native and COM add-in