Issue: You Get A Blank Page With Exchange 2007 OWA.
When trying to access Exchange 2007 OWA after the install of Service pack 2 you get the following message in IE address bar:
https://ex2007cas/owa/auth/logon.aspx?url=https://ex2007cas/owa/&reason=0
Fix: Download and Install the latest Exchange 2007 Rollup for Service pack 2 and run this script from the EMS after completed:
updateowa.ps1