upgrading .aspx web application in IIS

I am trying to upgrade my .aspx .NET application to IIS 8 from IIS 6.  I moved to web site and when I run it, I get an error that says Passport Manager is not installed.  I know it was removed from IIS 8, but will I need to rewrite my login, or is it just a matter of changing my configuration.  I have searched but didn't find any useful information.  Any help is much appreciated.
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The Passport service has since changed into Windows Live ID. While the new Live ID service certainly grew out of the legacy Passport service, there are major changes. One of the biggest changes is how a partner site integrates with Live ID. You can add Live ID authentication by using the publicly available Windows Live ID Web Authentication SDK. While the Windows Live ID service also supports identity Federation and ADFS, that capability is new functionality for specific cases, and is not a replacement for “Passport”.

You will have to rewrite your authentication methods.


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