Forum Discussion
OWA/ECP stop working after update ((
Hi KosmosKami,
You need to check the Event Viewer for the errors ID's when you try to access OWA.
Please provide also the output of the cmdlt posted in my previous reply, ( you can send me that in a private message ). It's possible that the certificate update failed and that could be the reason of your error. But without more details it's really hard to know. In EV you should be able to see more detailed error pointing to the right root cause.
It's quite interesting. I tried to find events using the error or warning filter. It turned out that the event I was interested in was with the information level. Event code 1309. The source is ASP.NET 4.0.30319.0
Event code: 3005
Event message: An unhandled exception occurred.
Event time: 07.03.2023 21:20:45
Event time (UTC): 07.03.2023 18:20:45
Event ID: c51f5e3a06fc4aa8b569417c2d2cbc90
Event sequence: 2
Event occurrence: 1
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/2/ROOT/owa-4603-133226868366278403
Trust level: Full
Application Virtual Path: /owa
Application Path: C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\owa\
Machine name: EMAIL
Process information:
Process ID: 20032
Process name: w3wp.exe
Account name: NT AUTHORITY\system
Exception information:
Exception type: ArgumentException
Exception message: An element with the same key has already been added.
in System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
in System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at Microsoft.Exchange.Clients.Owa.Core.OwaSettingsLoaderBase.InitializeLocalVersionFolders()
in Microsoft.Exchange.Clients.Owa.Core.OwaSettingsLoaderBase.Load()
at Microsoft.Exchange.Clients.Owa.Core.OwaSettingsLoader.Load()
in Microsoft.Exchange.Clients.Owa.Core.OwaApplicationBase.ExecuteApplicationStart(Object sender, EventArgs e)
in Microsoft.Exchange.Clients.Owa.Core.OwaModule.Init(HttpApplication context)
in System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr AppContext, HttpContext context, MethodInfo[] handlers)
in System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr AppContext, HttpContext context)
in System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr AppContext, HttpContext context)
in System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)
Request information:
Request URL: https://email.contoso.com:444/owa
Request path: /owa
User host address: my-ip-address
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\system
Thread information:
Thread ID: 63
Thread account name: NT AUTHORITY\system
Is impersonating: False
Stack trace: in System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
in System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at Microsoft.Exchange.Clients.Owa.Core.OwaSettingsLoaderBase.InitializeLocalVersionFolders()
in Microsoft.Exchange.Clients.Owa.Core.OwaSettingsLoaderBase.Load()
in Microsoft.Exchange.Clients.Owa.Core.OwaSettingsLoader.Load()
in Microsoft.Exchange.Clients.Owa.Core.OwaApplicationBase.ExecuteApplicationStart(Object sender, EventArgs e)
at Microsoft.Exchange.Clients.Owa.Core.OwaModule.Init(HttpApplication context)
in System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr AppContext, HttpContext context, MethodInfo[] handlers)
in System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr AppContext, HttpContext context)
in System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr AppContext, HttpContext context)
in System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)
Custom event details:
Hi KosmosKami,
From the EV log, it still seems that something is wrong with the SharedWebConfig.config file.
Maybe that copy paste wasn't the best way. Let me suggest the following steps:
- Navigate to C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess and if your pasted SharedWebConfig.config file is still there, move it to another location as backup.
- Run cd %ExchangeInstallPath%\bin to change the current directory to the bin folder that's under the Exchange installation path.
- Use the DependentAssemblyGenerator.exe tool to generate the file:
DependentAssemblyGenerator.exe -exchangePath "%ExchangeInstallPath%\bin" -exchangePath "%ExchangeInstallPath%\ClientAccess" -configFile "%ExchangeInstallPath%\ClientAccess\SharedWebConfig.config"- Restart the Server.
( Source: https://learn.microsoft.com/en-us/exchange/troubleshoot/client-connectivity/event-1309-code-3005-cannot-access-owa-ecp ).
Hope this helps.