Exchange 2007 OWA stops working with “reason=0” error
21/08/13 IPCA OWA stop working when the rollup 11 is applied to exchange 2007 sp3, in IE, it loads an blank screen, and in other browser, it using outlook web access Light, found the following solution, and this problem was related to Cause #2
[13:23:57] ***********************************************
[13:23:57] * UpdateOwa.ps1: 21/08/13 13:23:57
[13:23:58] Updating OWA on server IPCASERVER
[13:23:58] Finding OWA install path on the filesystem
[13:23:58] Updating OWA to version 8.3.327.1
[13:23:58] Copying files from ‘C:\Program Files\Microsoft\Exchange Server\ClientAccess\owa\Current’ to ‘C:\Program Files\Microsoft\Exchange Server\ClientAccess\owa\8.3.327.1’
[13:24:00] Getting all Exchange 2007 OWA virtual directories
[13:24:00] There are no Exchange 2007 OWA virtual directories. Aborting.
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Outlook Web Access on Exchange Server 2007 may stop working after an Update Rollup is applied. Users who connect to OWA may receive a browser script error or a blank page with a URL of:
https://mail.yourdomain.com/owa/auth/logon.aspx?url=https://mail.yourdomain.com/owa/&reason=0
This problem can be caused by either of these conditions:
Cause #1
The Update Rollup was applied while the %systemdrive%\ExchangeSetupLogs folder was missing.
Resolution #1
Replace or restore the ExchangeSetupLogs folder and run the Update Rollup again.
Cause #2
The Update Rollup was applied while IIS services were stopped or disabled. This will be apparent when you inspect the %systemdrive%\ExchangeSetupLogs\UpdateOwa.log file and find entries with the following text:
Getting all Exchange 2007 OWA Virtual Directories
There are no Exchange 2007 OWA Virtual Directories. Aborting.
Resolution #2
Enable and start the IIS services (which are required for the Client Access Server role) and run the Update Rollup again.

