Is it possible to add company wide important dates like holidays and inventory dates to Eschange 2003/Outllok 2003 calendar?

HI, Yes According to below article in Microsoft site it is possible.Customize the Outlook calendar with your company's important HR dates===============================================http://office.microsoft.com/en-us/outlook/HA010750021033.aspxRegardsChinthaka

If you want to import the holidays without user intervention, please try to use Mike Shens method in this post