Hi all

Have the following Exchange 2013 Environment:

2X CAS
2X MBX

all running CU9.

Every minutes the following happens on the two Mailbox Servers:

Event 1, MSExchange Error Logging Module

(Process w3wp.exe, PID 6796) "Unhandled exception 'Object reference not set to an instance of an object.' when processing request /powershell?ping=probe."

Event 1309, ASP.NET 4.0.30319.0

Event code: 3005

Event message: An unhandled exception has occurred.

Event time: 19.07.2015 17:16:49

Event time (UTC): 19.07.2015 15:16:49

Event ID: c83ef382e7624e6997e51f4b989b3692

Event sequence: 1696

Event occurrence: 1509

Event detail code: 0

Application information:

    Application domain: /LM/W3SVC/1/ROOT/PowerShell-1-130817022857915843

    Trust level: Full

    Application Virtual Path: /PowerShell

    Application Path: C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\PowerShell\

    Machine name: server1

Process information:

    Process ID: 6796

    Process name: w3wp.exe

    Account name: NT AUTHORITY\SYSTEM

Exception information:

    Exception type: NullReferenceException

    Exception message: Object reference not set to an instance of an object.

   at Microsoft.Exchange.Configuration.Core.WindowsIdentityToGenericIdentityModule.OnAuthenticateRequest(Object source, EventArgs e)

   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()

   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Request information:

    Request URL: http://server1.dom.local/powershell?ping=probe

    Request path: /powershell

    User host address: fe80::cd13:2806:71ca:37446796

    User: 

    Is authenticated: False

    Authentication Type: 

    Thread account name: NT AUTHORITY\SYSTEM

Thread information:

    Thread ID: 11

    Thread account name: NT AUTHORITY\SYSTEM

    Is impersonating: False

    Stack trace:    at Microsoft.Exchange.Configuration.Core.WindowsIdentityToGenericIdentityModule.OnAuthenticateRequest(Object source, EventArgs e)

   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()

   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Custom event details:

Something with Powershell.

Thank you for your help.

Best regards

Stefan

• Edited by Stefan Merz 13 hours 49 minutes ago

Hi Stefan,

Thank you for your question.

We could install the following software, the restart server to check if the issue persist:

1.        .Net Framework 4.5.2
2.        Window Management Framework 4.0(although it has been included with Window server 2012R2, we could install it to check if we need to repairing)

We could download then by the following links:

https://www.microsoft.com/en-us/download/details.aspx?id=42642

https://www.microsoft.com/en-us/download/details.aspx?id=40855

If the issue persist, we could refer to the following link to repair the PowerShell virtual directory:

Remove the PowerShell:

https://technet.microsoft.com/en-us/library/dd335085(v=exchg.150).aspx

New the PowerShell:

https://technet.microsoft.com/en-us/library/dd335058(v=exchg.150).aspx

If there are any questions regarding this issue, please be free to let me know.

Best Regard,

Jim