Blank page on OWA

[Adventech]

PROBLEM:
Blank page on owa.
After you install update rollup 1,2 or 3 on an Exchange 2010 Client Access Server you often get a blank OWA page when browsing to the OWA page.

After installing the rollup updates you will receive something like the following URL
https://mail.techfortechs.com/owa/auth/logon.aspx?url=https://mail.msexchangeblog.nl/owa/&reason=0

SOLUTION:
To fix this issue you must start updatecas.ps1 in the Exchange Management Shell. You can find the script in C:\Program Files\Microsoft\Exchange Server\V14\Bin . The script updatecas.ps1 will handle the OWA and ECP updates. The updatecas script comes with the update rollup.