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georgeagrant

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Outlook Web App didn't initialize. If the problem continues, please contact your helpdesk. Nullable object must have a value.

We had issues with a corrupt certificate. Had to uninstall OWA virtual directories and also from ADSI. I could not recreate the backend OWA from Command line so I did it manually in IIS. I also had to add OWA backend to ADSI so it might be missing some attributes, and not sure what they are.

Here is the issue I get now when logging into OWA on Exchange 2013


 Outlook Web App didn't initialize. If the problem continues, please contact your helpdesk.
Nullable object must have a value.  

--------------------------------------------------------------------------------

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Request
Url: https://exchange2k13.corp.corpcomm.com:444/owa/auth/error.aspx?ver=15.0.1076.9&cver=15.0.1044.25&cf=0&vC=0
User host address: ::1
OWA version: 15.0.1076.2

Exception
Exception type: Microsoft.Exchange.Clients.Owa.Core.OwaInvalidConfigurationException
Exception message: Nullable object must have a value.

Call stack

Microsoft.Exchange.Clients.Owa.Core.OwaConfigurationManager.CreateAndLoadConfigurationManager()
Microsoft.Exchange.Clients.Owa.Core.OwaSettingsLoaderBase.Load()
Microsoft.Exchange.Clients.Owa.Core.OwaSettingsLoader.Load()
Microsoft.Exchange.Clients.Owa.Core.OwaApplicationBase.ExecuteApplicationStart(Object sender, EventArgs e)

Inner Exception
Exception type: System.InvalidOperationException
Exception message: Nullable object must have a value.

Call stack

System.Nullable`1.get_Value()
Microsoft.Exchange.Clients.Owa.Core.Configuration..ctor(IConfigurationSession session, String virtualDirectory, String webSiteName, ADObjectId vDirADObjectId, Boolean isPhoneticSupportEnabled)
Microsoft.Exchange.Clients.Owa.Core.OwaConfigurationManager.LoadConfiguration()
Microsoft.Exchange.Clients.Owa.Core.OwaConfigurationManager.CreateAndLoadConfigurationManager()
ASKER CERTIFIED SOLUTION
Avatar of Simon Butler (Sembee)
Simon Butler (Sembee)
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Avatar of Mats Steves
Mats Steves

Rebuild the backend OWA virtual directory using new-webapplication cmdlet