Unable to redirect OWA(2007) from HTTP to HTTPs using custom error page.

I am sure there is a simple solution for this, I just cannot find it.

Basically, I have a new setup of Exchange 2007 SP3 on Server 2008 R2. I am trying to set it up so that when the user types http://mail.domain.com/owa it will redirect to https://mail.domain.com/owa.

I already have http redirection setup in IIS so that when they type mail.domain.com it will redirect and append /owa to the url.

On a previous install, I was able to accomplish the HTTP - HTTPS redirect quite simply by creating a custom error page (403.4), which is quite simply:

function redirectToHttps()

{

var httpURL = window.location.hostname+window.location.pathname;

var httpsURL = "https://"; + httpURL;

window.location = httpsURL;

}

redirectToHttps();

I placed this file in the inetpub directory, changed the response action to "Insert content from static file into the error response" and entered the absolute path of:

c:\inetpub\HttpsRedirect.htm.

No issues - the only difference between the setups is that the successful deployment was on a 2008 Standard Server and so I am thinking this MAY have something to do with R2.

When I test it out, I now get a 500.19 error page:

"Absolute physical path "C:\inetpub\HttpsRedirect.htm" is not allowed in system.webServer/httpErrors section in web.config file. Use relative path instead."

Any help here? Thanks!

Mike