How to access or change OWA settings for Exchange 2007/2003/2000?

There is no supported way of changing OWA settings using WebDAV for Exchange 2007.  Under Exchange 2000 and 2003, there were properties on the mailbox root which could be changed via code.  However OWA 2007 is a much different animal. Under Exchange 2000 and 2003, there are properties which you could get at with WebDAV…

3