Use the link you have configured to exchange and that should prompt you to login. Do that and make sure that bit works OK. PS I think exchange 2007 is the only supported platform for RM
The link I used to configure to exchange did prompt me to log in. Nothing happens after the log in occurs. I do know our environment is on at least 2010 and more likely 2013 of exchange.
I'm curious as to why resource manager was replaced with the built in appointments when most users (analysts and end users) manage their calendars in outlook.
If the link logged in correctly then you should be able to read mail just fine from that web site. If that doesn't work, then something else is wrong. I think you are not likely to be able to get this to work with any version of exchange above 2007. And I agree it is additional, not replacement functionality.