Scenario: Exchange 2010 Outlook Web App fails to initialize after a reboot.
Users are presented with the following error:
![Exchange 2010 - outlook web app not initializing Exchange 2010 - outlook web app not initializing](https://www.collaborationpro.com/wp-content/uploads/2016/09/owa1-300x35.jpg)
If we drop down the arrow it is giving an auth error.
The issue is the authentication type chosen on the OWA Virtual Directory:
![Exchange 2010 - outlook web app not initializing Exchange 2010 - outlook web app not initializing](https://www.collaborationpro.com/wp-content/uploads/2016/09/owa2-259x300.jpg)
Once the correct settings are selected and an IISRESET is performed you will be presented with the login page:
![Exchange 2010 - outlook web app not initializing Exchange 2010 - outlook web app not initializing](https://www.collaborationpro.com/wp-content/uploads/2016/09/owa3-260x300.jpg)
Depending on what authentication method you chose you will either get the window above or a credential box to enter your details.
![Exchange 2010 - outlook web app not initializing Exchange 2010 - outlook web app not initializing](https://www.collaborationpro.com/wp-content/uploads/2016/09/owa4-300x127.jpg)
As shown above we are now presented with the OWA page and can read/send emails.
Hope it helps.