Hi kym.
you must read the information on this website:
http://office.microsoft.com/en-us/outlook/HP010031101033.aspx
under "How to use command lines"
1.. Search for the Microsoft Outlook executable file, Outlook.exe, and
make a note of the path to Outlook.exe. For example, the path might be
C:\Program Files\Microsoft Office\Office11\Outlook.exe.
2.. Click Start, and then click Run.
3.. In the Open box, type the complete path you noted in step 1, including
the file name. Press the SPACEBAR once, and then type a forward slash mark
(/) followed by the switch.
For example, if you want to use the CleanReminders switch, the command you
type in the Open box should look like this:
"C:\Program Files\Microsoft Office\Office11\Outlook.exe" /Cleanviews
Note Paths that include spaces between words must be enclosed in
quotation marks (") and are case sensitive.
4.. To run the command, click OK.