Question : When Browsing to <a rel="nofollow" href="https://localhost/owa" target="_blank">https://localhost/owa</a> on an Exchange 2K7 server, I receive Service Unavailable.

I added an EX2K7 server to a domain with a working EX2K3 server.  The new server is 64bit, Install went perfectly after running the BestPracticesAnalyzer.  Exchange mail box move went OK with several problem mail boxes (what else is new).  All owa virtual folders are in place, but when I try to bring up OWA either on the same box, or accross the network I receive Service Unavailable errors.  Not much is available on support.microsoft.com.  Mail is flowing across the servers to the internet and internally.  All mailboxes are on the new server.
Any thoughts?

Answer : When Browsing to <a rel="nofollow" href="https://localhost/owa" target="_blank">https://localhost/owa</a> on an Exchange 2K7 server, I receive Service Unavailable.

I don't believe OWA has ever worked on this server and just wanted to mention that the original 2003 server is still in place.  I am reviewing the Event viewer.
Thanks again very much.