Hi

After the KB3062157 our ECP is gone our OWA Works with no issues. It states

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Server Error in '/ecp' Application.
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Could not load file or assembly 'Microsoft.Exchange.Security' or one of its dependencies. The system cannot find the file specified.
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

 Exception Details: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Exchange.Security' or one of its dependencies. The system cannot find the file specified.

Source Error:

 An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

Assembly Load Trace: The following information can be helpful to determine why the assembly 'Microsoft.Exchange.Security' could not be loaded.

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

 

Stack Trace:

[FileNotFoundException: Could not load file or assembly 'Microsoft.Exchange.Security' or one of its dependencies. The system cannot find the file specified.]
   System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName, ObjectHandleOnStack type) +0
   System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName) +153
   System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) +63
   System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) +124
   System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase) +76

[ConfigurationErrorsException: Could not load file or assembly 'Microsoft.Exchange.Security' or one of its dependencies. The system cannot find the file specified.]
   System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase) +12425356
   System.Web.Configuration.Common.ModulesEntry.SecureGetType(String typeName, String propertyName, ConfigurationElement configElement) +69
   System.Web.Configuration.Common.ModulesEntry..ctor(String name, String typeName, String propertyName, ConfigurationElement configElement) +62
   System.Web.HttpApplication.BuildIntegratedModuleCollection(List`1 moduleList) +299
   System.Web.HttpApplication.GetModuleCollection(IntPtr appContext) +1262
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +133
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +304
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +404
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +475

[HttpException (0x80004005): Could not load file or assembly 'Microsoft.Exchange.Security' or one of its dependencies. The system cannot find the file specified.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +12618692
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +159
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +12458309

 

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Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34248

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is anybody else having this issue? and how did you fix it?

Installed it Tuesday night ... wish I didnt K

/Mikkel

Hi,

According to your description, I understand that failed login ECP with error "Could not load file or assembly 'Microsoft.Exchange.Security' or one of its dependencies. The system cannot find the file specified" after install KB3062157.
If I misunderstand your concern, please do not hesitate to let me know.

Please try to open IIS management and switch to Application Pool, then recycle MSExchangeECPAppPool and reset IIS for testing.
Meanwhile,  run command to double check the state of Exchange system component: Get-ServerComponentstate -Identity servername
If the state is Inactive, please run below command to active relevant component:

Set-ServerComponentState <Identity> -Component component name -Requester HealthAPI -State Active

More details about Server Component States in Exchange 2013, please refer to:
http://blogs.technet.com/b/exchange/archive/2013/09/26/server-component-states-in-exchange-2013.aspx

Thanks

Hi Allen

We installed Exchange 2013 CU8: http://www.microsoft.com/en-us/download/details.aspx?id=46373 and it fixed it :-)

Regards

Mikkel