> Can anyone tell me please, how I can delete additional personal
> folders and their sub folders such as calander etc. in outlook 2003.
Depends on how they got there. If you can't right-click the root and choose
Close, then you need to create a new mail profile, because it sounds like
you damaged your existing one.
http://www.howto-outlook.com/faq/newprofile.htm

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Brian Tillman [MVP-Outlook]