Which version? If you're on Exchange 2003 then complaining about how a 7-8 year old program isn't up to scratch is a bit silly. Even 2007 is closing on 4 years old, and the web interface was improved a lot from 2003 to 2007 and again from Exchange 2007 to 2010 (not sure about calendaring specifically).
And if you are on Exchange 2003 or 2007 then IE gets the good browser interface, and every other browser gets a basic one.
Do I get some sort of notification when my inbox is full? No.
This is because someone hasn't turned it on for you; Exchange does this (by default, I thought). Emails you when you hit the "no more sending" limit, then again as you hit the "now so full you can't receive" limit.
And if you are on Exchange 2003 or 2007 then IE gets the good browser interface, and every other browser gets a basic one.
Do I get some sort of notification when my inbox is full? No.
This is because someone hasn't turned it on for you; Exchange does this (by default, I thought). Emails you when you hit the "no more sending" limit, then again as you hit the "now so full you can't receive" limit.