Im CU10 Update bemängelt im Uprade von Exchange 2016 CU den Microsoft Speech Pfad. Auch wenn man MSI hinterlegt. Lauft es nicht wieter

 at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)
[06.26.2018 15:45:29.0142] [1] [ERROR] The following error was generated when "$error.Clear();   
          uninstall-MsiPackage -ProductCode $RoleProductCode -LogFile $RoleLogFilePath -PropertyValues ("ESE=1");  

          uninstall-MsiPackage -ProductCode $RoleTeleProductCode -LogFile $RoleLogFilePath;

          if ( $RoleTransProductCode -ne [system.guid]::empty )
          {
            uninstall-MsiPackage -ProductCode $RoleTransProductCode -LogFile $RoleLogFilePath;
          }

          uninstall-MsiPackage -ProductCode $RoleTtsProductCode -LogFile $RoleLogFilePath;
        " was run: "Microsoft.Exchange.Configuration.Tasks.TaskException: Couldn't remove product with code 8466eaed-7024-4aee-9d13-f3a55b98d114. The installation source for this product is not available. Verify that the source exists and that you can access it. Error code is 1612. ---> System.ComponentModel.Win32Exception: The installation source for this product is not available. Verify that the source exists and that you can access it  
   --- End of inner exception stack trace ---
   at Microsoft.Exchange.Configuration.Tasks.Task.ThrowError(Exception exception, ErrorCategory errorCategory, Object target, String helpUrl)
   at Microsoft.Exchange.Management.Deployment.UninstallMsi.RemoveProductCode(Guid productCode)
   at Microsoft.Exchange.Management.Deployment.UninstallMsi.InternalProcessRecord()
   at Microsoft.Exchange.Configuration.Tasks.Task.<ProcessRecord>b__91_1()
   at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)".  
[06.26.2018 15:45:29.0142] [1] [ERROR] Couldn't remove product with code 8466eaed-7024-4aee-9d13-f3a55b98d114. The installation source for this product is not available. Verify that the source exists and that you can access it. Error code is 1612.  
[06.26.2018 15:45:29.0142] [1] [ERROR] The installation source for this product is not available. Verify that the source exists and that you can access it
[06.26.2018 15:45:29.0142] [1] [ERROR-REFERENCE] Id=UmLanguagePackComponent___adacb802c5fd485bbad616cb75d89385 Component=EXCHANGE14:\Current\Release\Client Access\Unified Messaging
[06.26.2018 15:45:29.0143] [1] Setup is stopping now because of one or more critical errors.
[06.26.2018 15:45:29.0143] [1] Finished executing component tasks.
[06.26.2018 15:45:29.0153] [1] Ending processing Install-UnifiedMessagingRole
[06.26.2018 15:45:32.0149]  CurrentResult setupbase.maincore:396: 0
[06.26.2018 15:45:32.0149]  End of Setup
[06.26.2018 15:45:32.0149]  **********************************************

The Microsoft Exchange Unified Messaging Call Router wasn't able to start. More information: "System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Rtc.Collaboration, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.  
File name: 'Microsoft.Rtc.Collaboration, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'  
   at Microsoft.Exchange.UM.UcmaPlatform.UcmaCallRouterPlatform..ctor(LocalizedString serviceName, LocalizedString serverName, UMADSettings config)
   at Microsoft.Exchange.UM.UcmaPlatform.UcmaPlatform.CreateCallRouterVoipPlatform(LocalizedString serviceName, LocalizedString serverName, UMADSettings config)
   at Microsoft.Exchange.UM.CallRouter.UMCallRouter.InternalStart()
   at Microsoft.Exchange.UM.UMCore.UMServiceBase.StartService()
   at Microsoft.Exchange.UM.UMCore.UMServiceBase.OnStartInternal(String args)

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].
"