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Exchange 2010 OWA authentication issues with Blackberry HTTP 500 error

I have Exchange 2010, and I managed to mess up Outlook Web Access.

OWA and Outlook Anywhere were working fine with exception of Blackberry devices which were not able to authenticate using Blackberry Internet Service.
After troubleshooting this issue with Blackberry support tech they suggested that I should change Forms Based authentication as it is apparently not supported with Blackberry Internet Service.
I agreed to change that, and it did not fix the issue, and even after changing the setting back to original I have now more problems as no client can access the OWA.

When I try to access the OWA by going to:


I get initial screen where I can enter the user name and password, but afterwards I am presented with blank page instead of the contents of the mailbox, and the address bar displays: https://mail.domain.com/owa/auth.owa 

It seems that my Outlook Anywhere is not affected as I am able to connect Outlook on my notebook through http proxy.

Any help with getting the OWA going again would be great.
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1 Solution
foolow the steps here to re-create the OWA virtual directory and re-apply the RU3


u might also have to uninstall and reinstall IIS.
pyotrekAuthor Commented:
I do not see how the issue described in the shortcut that you provided has any relevance to my problem - am I wrong?
Shreedhar EtteCommented:
Are you able to access the https://mail.domain.com/owa  and login successfully on your notebook?
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pyotrekAuthor Commented:
No I am not able to see mailbox regardless if I access it from internal or external location.
Like I said before - I see the initial "yellow logon page" of Outlook Web App, but after entering the credentials I get blank page with https://mail.domain.com/owa/auth.owa in the address field.

when trying to access it locally on the Exchange 2010 server box by going to:
https://localhost/owa - I get similar results - i get initial logon page and eventually I get:

The website cannot display the page
 HTTP 500  
   Most likely causes:
•The website is under maintenance.
•The website has a programming error.
   What you can try:
     Refresh the page.
     Go back to the previous page.
     More information

This error (HTTP 500 Internal Server Error) means that the website you are visiting had a server problem which prevented the webpage from displaying.

For more information about HTTP errors, see Help.
with https://localhost/owa/auth.owa in the address field of the browser.
pyotrekAuthor Commented:
You were right MS Exchange Forms-Based Authentication Service was not started - it is quite embarrassing especially that I went through services to check if all are running. Service is marked to start automatically, but for whatever reason it does not start anymore.
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