An unexpected error ocurred and your request couldn't be handled. After you install Exchange 2010 SP1 RU 3 in CAS server using redirect !!!!!

UPDATED!!!!
Spanish Version

Hey!
after you install Exchange 2010 Sp1 RU3 (the good roll up .. of course), in CAS server.., OWA stops working when we want to create a new email, or try to access to options or try access to some of the commands shown in the figure:

And the error that we get is:



This happens when we are using the IIS redirection, to redirect from http://webmail.domain.com/ to https:/ /webmail.domain.com /owa

Remembering how we use redirect in our CAS:

Solution

The problem is in the web.config file that is in the ExchangeInstallPath% path% \ClientAccess\owa, there is an entry in this file that redirects all that come to this site, creating a recursive loop and that the IIS can not handle , and because of this failure.

Deleting entry

<system.webServer>
        <httpRedirect enabled="true" exactDestination="false" />
    </system.webServer>

*********************************************************************************
UPDATED!!!
We have also seen that when we want to open the  OWA's options, although we have not a message error ... it is on the same page and does not enter a / ECP ... same entry exists in the same file in%ExchangeInstallPath%\clientAccess\ecp

Delete this entry
<httpRedirect childOnly="true" />
**********************************************************************************

After that do an IISRESET re enter to OWA and will be able to create a new email and return to normal operation.

I hope you find it useful.

-Dario