View shared calendar via Outlook Web Access

What:

Microsoft Exchange 2003

Problem:

User needs to view shared calendar via OWA

Solution:

You need to use direct link to other person's calendar.
Let's say that your OWA url is

http://mail.example.com/exchange

Link that you need to navigate to will be

http://mail.example.com/exchange/user@example.com/calendar/

replace user@example.com with desired email address.