Had a brainwave today. My Outlook uses offline folders so I know what my calendar (and email) is like when I am away from the office. However, there does not seem to be a way to make someone elses calendar available whilst offline……HOWEVER, if you can access their calendar using Outlook Web Access (OWA) then you can bookmark the url for their current months calendar and then set it to be synchronised whilst offline. Then whilst not connected to the net you will have access to their calendar.
With me so far?
The main problem is that it is not obvious to work out how to set the calendar view so it shows you a whole month and not just today. For example http://exchangeserver/user/calendar will only give you the daily view.
If you append ?Cmd=contents&View=monthly to the url, then you get the month view…
http://server/user/calendar/?Cmd=contents&View=monthly will then work.
This was all thanks to the (eventually tracked down) Google Groups Post
Hope this helps you!