Preparing for Exchange 2010 Client Access

One of the neatest features of 2010 is the ability to allow it to be the "front end" forms based authentication for all users. It can pass off the authentication and user to your legacy OWA server as well. You just need to configure your Exchange 2010 OWA virtual directory with the correct URL path:

Get-OwaVirtualDirectory -Server exch2010RC Set-OwaVirtualDirectory -Exchange2003Url "https://owa.swinc.com/owa"

Once that is configured, legacy mailbox users are passed off to the URL given (and are NOT re-prompted for authentication, either!)