So I had recently installed Exchange 2010 SP1 on my Lab Domain and was struggling to get OWA working – all I got was a blank page and no Form-Based Authentication logon..

After a lot of suggestions about recreating OWA to redirects in IIS and a Web.Config file, i eventually stumbled across this post..

http://www.msexchangeblog.nl/2010/05/11/blank-page-in-owa-fix-for-exchange-2010/

Which basically says to run a powershell script buried within Exchange to update the CAS

 

Voila! All now up and running..

 

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