I have a MS Exchange 2003 server and need to upgrade it to 2010. I have one domain in this example called mydomain.org. When users are on the outside they type in: www.mydomain.org/exchange which points to a public ip(this example: 188.8.131.52) and from the inside I just point there Outlook account to the server(company-exc-001), and way we go. Also I am not using a ISA server. In my reading a lot of users transition from 2003 to 2010 basically coexisting and then remove after awhile. Could anyone give me "exact" steps to follow? I know that is asking a lot but pointing in the correct direction would be great. And any other helpful information to look out for or read would be great. Thanks!